diff --git a/.env.example b/.env.example
index db9f7b55f..5f18833ae 100644
--- a/.env.example
+++ b/.env.example
@@ -323,6 +323,14 @@ OPENHUMAN_ANALYTICS_ENABLED=true
 # OPENHUMAN_COMPOSIO_CLICKUP_SYNC_INTERVAL_SECS=3600
 # OPENHUMAN_COMPOSIO_GITHUB_SYNC_INTERVAL_SECS=3600
 # OPENHUMAN_COMPOSIO_LINEAR_SYNC_INTERVAL_SECS=3600
+#
+# Global memory-sync cadence (seconds) applied to ALL opted-in sources,
+# overriding the per-provider defaults above (floored at each provider default
+# so we never sync more often than the provider intends). This is the ops-level
+# equivalent of the Memory Sources schedule control (#3302). Normally set from
+# the UI; this var is for headless / fleet deployments. `0` means "Manual only"
+# (periodic auto-sync disabled). Unset → 24h default.
+# OPENHUMAN_MEMORY_SYNC_INTERVAL_SECS=86400
 
 # ---------------------------------------------------------------------------
 # Logging
diff --git a/app/src/components/intelligence/MemorySourcesRegistry.tsx b/app/src/components/intelligence/MemorySourcesRegistry.tsx
index 2331f576f..cb15d71ba 100644
--- a/app/src/components/intelligence/MemorySourcesRegistry.tsx
+++ b/app/src/components/intelligence/MemorySourcesRegistry.tsx
@@ -8,6 +8,7 @@
  * row dispatches `openhuman.memory_sources_sync` which runs in the
  * background and emits MemorySyncStageChanged events.
  */
+import debug from 'debug';
 import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 
 import { useT } from '../../lib/i18n/I18nContext';
@@ -28,11 +29,18 @@ import type {
   ConfirmationModal as ConfirmationModalType,
   ToastNotification,
 } from '../../types/intelligence';
+import {
+  type MemorySyncSettings,
+  openhumanGetMemorySyncSettings,
+  openhumanUpdateMemorySyncSettings,
+} from '../../utils/tauriCommands/config';
 import { memoryTreeFlushSource } from '../../utils/tauriCommands/memoryTree';
 import { AddMemorySourceDialog } from './AddMemorySourceDialog';
 import { ConfirmationModal } from './ConfirmationModal';
 import { SourceSettingsPanel } from './SourceSettingsPanel';
 
+const log = debug('intelligence:memory-sync');
+
 interface MemorySourcesRegistryProps {
   onToast?: (toast: Omit<ToastNotification, 'id'>) => void;
   pollIntervalMs?: number;
@@ -292,6 +300,19 @@ export function MemorySourcesRegistry({
     return m;
   }, [statuses]);
 
+  // Newest chunk timestamp across every source — the "Last synced …" anchor
+  // for the global schedule header. Derived from persisted chunk data, so it
+  // survives restarts.
+  const overallLastSyncMs = useMemo(() => {
+    let newest: number | null = null;
+    for (const s of statuses) {
+      if (s.last_chunk_at_ms != null && (newest === null || s.last_chunk_at_ms > newest)) {
+        newest = s.last_chunk_at_ms;
+      }
+    }
+    return newest;
+  }, [statuses]);
+
   const handleToggle = useCallback(
     async (source: MemorySourceEntry) => {
       try {
@@ -491,6 +512,8 @@ export function MemorySourcesRegistry({
         </div>
       </header>
 
+      <MemorySyncSchedule lastSyncMs={overallLastSyncMs} onToast={onToast} />
+
       {loading ? (
         <p className="text-xs text-stone-500 dark:text-neutral-400">{t('common.loading')}</p>
       ) : sources.length === 0 ? (
@@ -532,6 +555,131 @@ export function MemorySourcesRegistry({
   );
 }
 
+/** Manual-only sentinel — stored as `sync_interval_secs = 0`. */
+const MANUAL_INTERVAL_SECS = 0;
+/** Preset cadences offered in the UI (seconds): 4h / 12h / 24h. */
+const SYNC_INTERVAL_PRESETS_SECS = [14_400, 43_200, 86_400];
+
+/** Human label for a cadence ("Every 4h" / "Every 30m" / "Manual only"). */
+function intervalChipLabel(secs: number, t: (k: string) => string): string {
+  if (secs === MANUAL_INTERVAL_SECS) return t('memorySyncInterval.manual');
+  if (secs % 3600 === 0) {
+    return t('memorySyncInterval.everyHours').replace('{h}', String(secs / 3600));
+  }
+  return t('memorySyncInterval.everyMinutes').replace('{m}', String(Math.round(secs / 60)));
+}
+
+interface MemorySyncScheduleProps {
+  lastSyncMs: number | null;
+  onToast?: (toast: Omit<ToastNotification, 'id'>) => void;
+}
+
+/**
+ * Global memory-sync schedule control (#3302). Presented like a backup
+ * schedule: "Last synced … · Sync every …", with preset cadences (4h / 12h /
+ * 24h) plus "Manual only". Reads/writes `config_*_memory_sync_settings`.
+ */
+function MemorySyncSchedule({ lastSyncMs, onToast }: MemorySyncScheduleProps) {
+  const { t } = useT();
+  const [settings, setSettings] = useState<MemorySyncSettings | null>(null);
+  const [saving, setSaving] = useState(false);
+
+  useEffect(() => {
+    let active = true;
+    const loadSettings = async () => {
+      try {
+        const resp = await openhumanGetMemorySyncSettings();
+        if (active) setSettings(resp.result);
+      } catch (err) {
+        log('get settings failed: %O', err);
+      }
+    };
+    void loadSettings();
+    return () => {
+      active = false;
+    };
+  }, []);
+
+  const handleSelect = useCallback(
+    async (secs: number) => {
+      setSaving(true);
+      try {
+        const resp = await openhumanUpdateMemorySyncSettings({ sync_interval_secs: secs });
+        setSettings(resp.result);
+      } catch (err) {
+        onToast?.({
+          type: 'error',
+          title: t('memorySyncInterval.saveFailed'),
+          message: err instanceof Error ? err.message : String(err),
+        });
+      } finally {
+        setSaving(false);
+      }
+    },
+    [onToast, t]
+  );
+
+  if (!settings) return null;
+
+  const lastSync = relativeTimestamp(lastSyncMs, t);
+  const currentLabel = settings.is_manual
+    ? t('memorySyncInterval.manual')
+    : intervalChipLabel(settings.selected_secs, t);
+  // Option list: backend presets (fall back to the local defaults) + Manual.
+  const presetSecs =
+    settings.presets && settings.presets.length > 0 ? settings.presets : SYNC_INTERVAL_PRESETS_SECS;
+  const options = [...presetSecs, MANUAL_INTERVAL_SECS];
+  const selectedSecs = settings.is_manual ? MANUAL_INTERVAL_SECS : settings.selected_secs;
+
+  return (
+    <div
+      className="mb-3 rounded-md border border-stone-200 bg-stone-50 p-3 dark:border-neutral-800 dark:bg-neutral-800/40"
+      data-testid="memory-sync-schedule">
+      <div className="flex flex-wrap items-center justify-between gap-2">
+        <div className="min-w-0">
+          <p className="text-xs font-semibold text-stone-600 dark:text-neutral-300">
+            {t('memorySyncInterval.title')}
+          </p>
+          <p className="mt-0.5 text-xs text-stone-500 dark:text-neutral-400">
+            <span>
+              {t('memorySyncInterval.lastSynced')} {lastSync ?? t('memorySyncInterval.never')}
+            </span>
+            <span aria-hidden="true"> · </span>
+            <span data-testid="memory-sync-current">{currentLabel}</span>
+          </p>
+        </div>
+        <div
+          role="radiogroup"
+          aria-label={t('memorySyncInterval.title')}
+          className="flex flex-wrap items-center gap-1.5">
+          {options.map(secs => {
+            const isSelected = secs === selectedSecs;
+            return (
+              <button
+                key={secs}
+                type="button"
+                role="radio"
+                aria-checked={isSelected}
+                disabled={saving}
+                onClick={() => void handleSelect(secs)}
+                data-testid={`memory-sync-preset-${secs}`}
+                className={`rounded-md border px-2.5 py-1 text-xs font-medium transition-colors
+                  focus:outline-none focus:ring-2 focus:ring-primary-200
+                  disabled:cursor-not-allowed disabled:opacity-50 ${
+                    isSelected
+                      ? 'border-primary-500 bg-primary-50 text-primary-700 dark:border-primary-500/50 dark:bg-primary-500/10 dark:text-primary-300'
+                      : 'border-stone-200 bg-white text-stone-600 hover:bg-stone-100 dark:border-neutral-700 dark:bg-neutral-900 dark:text-neutral-300 dark:hover:bg-neutral-800'
+                  }`}>
+                {intervalChipLabel(secs, t)}
+              </button>
+            );
+          })}
+        </div>
+      </div>
+    </div>
+  );
+}
+
 interface SourceRowProps {
   source: MemorySourceEntry;
   status: SourceStatus | null;
diff --git a/app/src/components/intelligence/__tests__/MemorySourcesRegistry.test.tsx b/app/src/components/intelligence/__tests__/MemorySourcesRegistry.test.tsx
index bc8c32d60..1e86e1660 100644
--- a/app/src/components/intelligence/__tests__/MemorySourcesRegistry.test.tsx
+++ b/app/src/components/intelligence/__tests__/MemorySourcesRegistry.test.tsx
@@ -8,6 +8,10 @@ import { beforeEach, describe, expect, it, vi } from 'vitest';
 import * as service from '../../../services/memorySourcesService';
 import type { MemorySourceEntry } from '../../../services/memorySourcesService';
 import { renderWithProviders } from '../../../test/test-utils';
+import {
+  openhumanGetMemorySyncSettings,
+  openhumanUpdateMemorySyncSettings,
+} from '../../../utils/tauriCommands/config';
 import { MemorySourcesRegistry } from '../MemorySourcesRegistry';
 
 // Mock the entire service so we don't hit RPC
@@ -31,10 +35,33 @@ vi.mock('../../../utils/tauriCommands/memoryTree', () => ({
   memoryTreeFlushSource: vi.fn().mockResolvedValue({ seals_fired: 0 }),
 }));
 
+// Mock the memory-sync schedule config RPCs (#3302).
+vi.mock('../../../utils/tauriCommands/config', () => ({
+  openhumanGetMemorySyncSettings: vi.fn(),
+  openhumanUpdateMemorySyncSettings: vi.fn(),
+}));
+
 const mockedList = vi.mocked(service.listMemorySources);
 const mockedStatus = vi.mocked(service.memorySourcesStatusList);
 const mockedUpdate = vi.mocked(service.updateMemorySource);
 const mockedApplyAllIn = vi.mocked(service.applyAllIn);
+const mockedGetSync = vi.mocked(openhumanGetMemorySyncSettings);
+const mockedUpdateSync = vi.mocked(openhumanUpdateMemorySyncSettings);
+
+function syncSettings(overrides: Record<string, unknown> = {}) {
+  return {
+    result: {
+      sync_interval_secs: null,
+      selected_secs: 86_400,
+      is_manual: false,
+      is_default: true,
+      default_secs: 86_400,
+      presets: [14_400, 43_200, 86_400],
+      ...overrides,
+    },
+    logs: [],
+  };
+}
 
 function makeSource(overrides: Partial<MemorySourceEntry> = {}): MemorySourceEntry {
   return {
@@ -61,6 +88,9 @@ function setup(sources: MemorySourceEntry[] = [makeSource()]) {
 describe('MemorySourcesRegistry', () => {
   beforeEach(() => {
     vi.clearAllMocks();
+    // Default: schedule RPCs succeed with the unset/default 24h view.
+    mockedGetSync.mockResolvedValue(syncSettings());
+    mockedUpdateSync.mockResolvedValue(syncSettings());
   });
 
   // -------------------------------------------------------------------------
@@ -319,4 +349,85 @@ describe('MemorySourcesRegistry', () => {
       expect(onToast).toHaveBeenCalledWith(expect.objectContaining({ type: 'error' }));
     });
   });
+
+  // -------------------------------------------------------------------------
+  // Memory sync schedule (#3302)
+  // -------------------------------------------------------------------------
+  it('renders the sync schedule with the default 24h cadence highlighted', async () => {
+    setup();
+    const schedule = await screen.findByTestId('memory-sync-schedule');
+    // Default view highlights the 24h preset.
+    const preset24h = within(schedule).getByTestId('memory-sync-preset-86400');
+    expect(preset24h).toHaveAttribute('aria-checked', 'true');
+    // Manual is offered and not selected.
+    const manual = within(schedule).getByTestId('memory-sync-preset-0');
+    expect(manual).toHaveAttribute('aria-checked', 'false');
+    // The summary shows the current cadence.
+    expect(within(schedule).getByTestId('memory-sync-current')).toHaveTextContent('Every 24h');
+  });
+
+  it('shows "Last synced …" from the newest source chunk timestamp', async () => {
+    mockedList.mockResolvedValue([makeSource()]);
+    mockedStatus.mockResolvedValue([
+      {
+        source_id: 'src_1',
+        chunks_synced: 5,
+        chunks_pending: 0,
+        last_chunk_at_ms: Date.now() - 2 * 60 * 60 * 1000,
+        freshness: 'recent',
+      },
+    ]);
+    renderWithProviders(<MemorySourcesRegistry pollIntervalMs={0} />);
+    const schedule = await screen.findByTestId('memory-sync-schedule');
+    await waitFor(() => {
+      expect(schedule).toHaveTextContent(/Last synced/i);
+      expect(schedule).toHaveTextContent(/2h ago/i);
+    });
+  });
+
+  it('selecting a preset calls update with the cadence in seconds', async () => {
+    setup();
+    const schedule = await screen.findByTestId('memory-sync-schedule');
+
+    mockedUpdateSync.mockResolvedValue(
+      syncSettings({ sync_interval_secs: 14_400, selected_secs: 14_400, is_default: false })
+    );
+    fireEvent.click(within(schedule).getByTestId('memory-sync-preset-14400'));
+
+    await waitFor(() => {
+      expect(mockedUpdateSync).toHaveBeenCalledWith({ sync_interval_secs: 14_400 });
+    });
+    await waitFor(() => {
+      expect(within(schedule).getByTestId('memory-sync-current')).toHaveTextContent('Every 4h');
+    });
+  });
+
+  it('selecting Manual sends sync_interval_secs = 0 and shows Manual only', async () => {
+    setup();
+    const schedule = await screen.findByTestId('memory-sync-schedule');
+
+    mockedUpdateSync.mockResolvedValue(
+      syncSettings({ sync_interval_secs: 0, selected_secs: 0, is_manual: true, is_default: false })
+    );
+    fireEvent.click(within(schedule).getByTestId('memory-sync-preset-0'));
+
+    await waitFor(() => {
+      expect(mockedUpdateSync).toHaveBeenCalledWith({ sync_interval_secs: 0 });
+    });
+    await waitFor(() => {
+      expect(within(schedule).getByTestId('memory-sync-current')).toHaveTextContent('Manual only');
+    });
+  });
+
+  it('schedule update failure shows an error toast', async () => {
+    const { onToast } = setup();
+    const schedule = await screen.findByTestId('memory-sync-schedule');
+
+    mockedUpdateSync.mockRejectedValue(new Error('RPC down'));
+    fireEvent.click(within(schedule).getByTestId('memory-sync-preset-14400'));
+
+    await waitFor(() => {
+      expect(onToast).toHaveBeenCalledWith(expect.objectContaining({ type: 'error' }));
+    });
+  });
 });
diff --git a/app/src/lib/i18n/ar.ts b/app/src/lib/i18n/ar.ts
index 9fb469610..bca179998 100644
--- a/app/src/lib/i18n/ar.ts
+++ b/app/src/lib/i18n/ar.ts
@@ -1926,6 +1926,13 @@ const messages: TranslationMap = {
   'sync.sync': 'مزامنة',
   'sync.failedToLoad': 'فشل تحميل حالة المزامنة',
   'sync.noContent': 'لم تتم مزامنة أي محتوى في الذاكرة بعد. اربط تكاملاً للبدء.',
+  'memorySyncInterval.title': 'جدول المزامنة',
+  'memorySyncInterval.lastSynced': 'آخر مزامنة',
+  'memorySyncInterval.never': 'أبدًا',
+  'memorySyncInterval.everyHours': 'كل {h} ساعة',
+  'memorySyncInterval.everyMinutes': 'كل {m} دقيقة',
+  'memorySyncInterval.manual': 'يدوي فقط',
+  'memorySyncInterval.saveFailed': 'فشل تحديث جدول المزامنة',
   'memorySources.title': 'المصادر الذاكرة',
   'memorySources.empty': 'لا توجد مصادر للذاكرة بعد أضف واحدة لبدء تغذية الذاكرة.',
   'memorySources.customSources': 'المصادر العرفية',
diff --git a/app/src/lib/i18n/bn.ts b/app/src/lib/i18n/bn.ts
index 53370dc94..97f9e1968 100644
--- a/app/src/lib/i18n/bn.ts
+++ b/app/src/lib/i18n/bn.ts
@@ -1965,6 +1965,13 @@ const messages: TranslationMap = {
   'sync.failedToLoad': 'সিঙ্ক স্ট্যাটাস লোড করতে ব্যর্থ',
   'sync.noContent':
     'এখনো কোনো কন্টেন্ট মেমোরিতে সিঙ্ক হয়নি। শুরু করতে একটি ইন্টিগ্রেশন সংযুক্ত করুন।',
+  'memorySyncInterval.title': 'সিঙ্ক সময়সূচি',
+  'memorySyncInterval.lastSynced': 'সর্বশেষ সিঙ্ক',
+  'memorySyncInterval.never': 'কখনও না',
+  'memorySyncInterval.everyHours': 'প্রতি {h} ঘণ্টা',
+  'memorySyncInterval.everyMinutes': 'প্রতি {m} মিনিট',
+  'memorySyncInterval.manual': 'শুধু ম্যানুয়াল',
+  'memorySyncInterval.saveFailed': 'সিঙ্ক সময়সূচি আপডেট করা যায়নি',
   'memorySources.title': 'মেমরি উৎস',
   'memorySources.empty': 'কোনো মেমরি পাওয়া যায়নি। স্মৃতি খাওয়া শুরু করতে একটা যোগ করো।',
   'memorySources.customSources': 'স্বনির্ধারিত উৎস',
diff --git a/app/src/lib/i18n/de.ts b/app/src/lib/i18n/de.ts
index b468a30b4..b8041aaee 100644
--- a/app/src/lib/i18n/de.ts
+++ b/app/src/lib/i18n/de.ts
@@ -2014,6 +2014,13 @@ const messages: TranslationMap = {
   'sync.failedToLoad': 'Der Synchronisierungsstatus konnte nicht geladen werden',
   'sync.noContent':
     'Es wurden noch keine Inhalte in den Speicher synchronisiert. Verbinde eine Integration, um zu beginnen.',
+  'memorySyncInterval.title': 'Synchronisierungsplan',
+  'memorySyncInterval.lastSynced': 'Zuletzt synchronisiert',
+  'memorySyncInterval.never': 'nie',
+  'memorySyncInterval.everyHours': 'Alle {h} Std.',
+  'memorySyncInterval.everyMinutes': 'Alle {m} Min.',
+  'memorySyncInterval.manual': 'Nur manuell',
+  'memorySyncInterval.saveFailed': 'Synchronisierungsplan konnte nicht aktualisiert werden',
   'memorySources.title': 'Speicherquellen',
   'memorySources.empty':
     'Noch keine Speicherquellen. Fügen Sie einen hinzu, um den Fütterungsspeicher zu starten',
diff --git a/app/src/lib/i18n/en.ts b/app/src/lib/i18n/en.ts
index b70292f73..cc4d13c8b 100644
--- a/app/src/lib/i18n/en.ts
+++ b/app/src/lib/i18n/en.ts
@@ -2419,6 +2419,15 @@ const en: TranslationMap = {
   'sync.failedToLoad': 'Failed to load sync status',
   'sync.noContent': 'No content has been synced into memory yet. Connect an integration to start.',
 
+  // Memory Sync Schedule (global cadence)
+  'memorySyncInterval.title': 'Sync schedule',
+  'memorySyncInterval.lastSynced': 'Last synced',
+  'memorySyncInterval.never': 'never',
+  'memorySyncInterval.everyHours': 'Every {h}h',
+  'memorySyncInterval.everyMinutes': 'Every {m}m',
+  'memorySyncInterval.manual': 'Manual only',
+  'memorySyncInterval.saveFailed': 'Failed to update sync schedule',
+
   // Memory Sources Registry
   'memorySources.title': 'Memory Sources',
   'memorySources.empty': 'No memory sources yet. Add one to start feeding memory.',
diff --git a/app/src/lib/i18n/es.ts b/app/src/lib/i18n/es.ts
index 4c68e1e4c..d58f1b306 100644
--- a/app/src/lib/i18n/es.ts
+++ b/app/src/lib/i18n/es.ts
@@ -2006,6 +2006,13 @@ const messages: TranslationMap = {
   'sync.failedToLoad': 'No se pudo cargar el estado de sincronización',
   'sync.noContent':
     'Aún no se ha sincronizado contenido en la memoria. Conecta una integración para empezar.',
+  'memorySyncInterval.title': 'Programa de sincronización',
+  'memorySyncInterval.lastSynced': 'Última sincronización',
+  'memorySyncInterval.never': 'nunca',
+  'memorySyncInterval.everyHours': 'Cada {h} h',
+  'memorySyncInterval.everyMinutes': 'Cada {m} min',
+  'memorySyncInterval.manual': 'Solo manual',
+  'memorySyncInterval.saveFailed': 'No se pudo actualizar el programa de sincronización',
   'memorySources.title': 'Fuentes de memoria',
   'memorySources.empty':
     'Aún no hay fuentes de memoria. Agrega una para comenzar a alimentar la memoria.',
diff --git a/app/src/lib/i18n/fr.ts b/app/src/lib/i18n/fr.ts
index 3b02c7bde..900166826 100644
--- a/app/src/lib/i18n/fr.ts
+++ b/app/src/lib/i18n/fr.ts
@@ -2012,6 +2012,13 @@ const messages: TranslationMap = {
   'sync.failedToLoad': "Échec du chargement de l'état de synchronisation",
   'sync.noContent':
     "Aucun contenu n'a encore été synchronisé dans la mémoire. Connecte une intégration pour commencer.",
+  'memorySyncInterval.title': 'Calendrier de synchronisation',
+  'memorySyncInterval.lastSynced': 'Dernière synchronisation',
+  'memorySyncInterval.never': 'jamais',
+  'memorySyncInterval.everyHours': 'Toutes les {h} h',
+  'memorySyncInterval.everyMinutes': 'Toutes les {m} min',
+  'memorySyncInterval.manual': 'Manuel uniquement',
+  'memorySyncInterval.saveFailed': 'Échec de la mise à jour du calendrier de synchronisation',
   'memorySources.title': 'Sources de mémoire',
   'memorySources.empty':
     'Aucune source de mémoire pour le moment. Ajoutez-en une pour commencer à alimenter la mémoire.',
diff --git a/app/src/lib/i18n/hi.ts b/app/src/lib/i18n/hi.ts
index 8db280bda..d30dd5f8e 100644
--- a/app/src/lib/i18n/hi.ts
+++ b/app/src/lib/i18n/hi.ts
@@ -1965,6 +1965,13 @@ const messages: TranslationMap = {
   'sync.failedToLoad': 'सिंक स्टेटस लोड नहीं हो पाई',
   'sync.noContent':
     'अभी कोई कॉन्टेंट मेमोरी में सिंक नहीं हुआ। शुरू करने के लिए कोई इंटीग्रेशन कनेक्ट करें।',
+  'memorySyncInterval.title': 'सिंक शेड्यूल',
+  'memorySyncInterval.lastSynced': 'अंतिम सिंक',
+  'memorySyncInterval.never': 'कभी नहीं',
+  'memorySyncInterval.everyHours': 'हर {h} घंटे',
+  'memorySyncInterval.everyMinutes': 'हर {m} मिनट',
+  'memorySyncInterval.manual': 'केवल मैन्युअल',
+  'memorySyncInterval.saveFailed': 'सिंक शेड्यूल अपडेट करने में विफल',
   'memorySources.title': 'मेमोरी स्रोत',
   'memorySources.empty':
     'अभी तक कोई स्मृति स्रोत नहीं है। एक को खिला मेमोरी शुरू करने के लिए जोड़ें।',
diff --git a/app/src/lib/i18n/id.ts b/app/src/lib/i18n/id.ts
index f22c1f17f..284100616 100644
--- a/app/src/lib/i18n/id.ts
+++ b/app/src/lib/i18n/id.ts
@@ -1968,6 +1968,13 @@ const messages: TranslationMap = {
   'sync.failedToLoad': 'Gagal memuat status sinkronisasi',
   'sync.noContent':
     'Belum ada konten yang disinkronkan ke memori. Hubungkan integrasi untuk memulai.',
+  'memorySyncInterval.title': 'Jadwal sinkronisasi',
+  'memorySyncInterval.lastSynced': 'Terakhir disinkronkan',
+  'memorySyncInterval.never': 'tidak pernah',
+  'memorySyncInterval.everyHours': 'Setiap {h} jam',
+  'memorySyncInterval.everyMinutes': 'Setiap {m} menit',
+  'memorySyncInterval.manual': 'Hanya manual',
+  'memorySyncInterval.saveFailed': 'Gagal memperbarui jadwal sinkronisasi',
   'memorySources.title': 'Sumber Memori',
   'memorySources.empty': 'Belum ada sumber ingatan. Tambahkan satu untuk mulai makan memori.',
   'memorySources.customSources': 'Sumber Kustom',
diff --git a/app/src/lib/i18n/it.ts b/app/src/lib/i18n/it.ts
index a3a534820..0956264e4 100644
--- a/app/src/lib/i18n/it.ts
+++ b/app/src/lib/i18n/it.ts
@@ -1996,6 +1996,14 @@ const messages: TranslationMap = {
   'sync.failedToLoad': 'Impossibile caricare lo stato di sincronizzazione',
   'sync.noContent':
     "Nessun contenuto è stato sincronizzato nella memoria. Connetti un'integrazione per iniziare.",
+  'memorySyncInterval.title': 'Pianificazione sincronizzazione',
+  'memorySyncInterval.lastSynced': 'Ultima sincronizzazione',
+  'memorySyncInterval.never': 'mai',
+  'memorySyncInterval.everyHours': 'Ogni {h} h',
+  'memorySyncInterval.everyMinutes': 'Ogni {m} min',
+  'memorySyncInterval.manual': 'Solo manuale',
+  'memorySyncInterval.saveFailed':
+    'Impossibile aggiornare la pianificazione della sincronizzazione',
   'memorySources.title': 'Fonti di memoria',
   'memorySources.empty':
     'Ancora nessuna fonte di memoria. Aggiungine una per iniziare a alimentare la memoria.',
diff --git a/app/src/lib/i18n/ko.ts b/app/src/lib/i18n/ko.ts
index dc8955891..c8bfd5905 100644
--- a/app/src/lib/i18n/ko.ts
+++ b/app/src/lib/i18n/ko.ts
@@ -1943,6 +1943,13 @@ const messages: TranslationMap = {
   'sync.sync': '동기화',
   'sync.failedToLoad': '동기화 상태를 불러오지 못했습니다',
   'sync.noContent': '아직 메모리에 동기화된 콘텐츠가 없습니다. 시작하려면 통합을 연결하세요.',
+  'memorySyncInterval.title': '동기화 일정',
+  'memorySyncInterval.lastSynced': '마지막 동기화',
+  'memorySyncInterval.never': '안 함',
+  'memorySyncInterval.everyHours': '{h}시간마다',
+  'memorySyncInterval.everyMinutes': '{m}분마다',
+  'memorySyncInterval.manual': '수동만',
+  'memorySyncInterval.saveFailed': '동기화 일정을 업데이트하지 못했습니다',
   'memorySources.title': '메모리 소스',
   'memorySources.empty': '아직 메모리 소스가 없습니다. 메모리를 채우려면 하나를 추가하세요.',
   'memorySources.customSources': '사용자 지정 소스',
diff --git a/app/src/lib/i18n/pl.ts b/app/src/lib/i18n/pl.ts
index 994972c19..c2d2a302f 100644
--- a/app/src/lib/i18n/pl.ts
+++ b/app/src/lib/i18n/pl.ts
@@ -1986,6 +1986,13 @@ const messages: TranslationMap = {
   'sync.failedToLoad': 'Nie udało się wczytać stanu synchronizacji',
   'sync.noContent':
     'Żadna treść nie została jeszcze zsynchronizowana do pamięci. Podłącz integrację, aby zacząć.',
+  'memorySyncInterval.title': 'Harmonogram synchronizacji',
+  'memorySyncInterval.lastSynced': 'Ostatnia synchronizacja',
+  'memorySyncInterval.never': 'nigdy',
+  'memorySyncInterval.everyHours': 'Co {h} godz.',
+  'memorySyncInterval.everyMinutes': 'Co {m} min',
+  'memorySyncInterval.manual': 'Tylko ręcznie',
+  'memorySyncInterval.saveFailed': 'Nie udało się zaktualizować harmonogramu synchronizacji',
   'memorySources.title': 'Źródła pamięci',
   'memorySources.empty': 'Brak źródeł pamięci. Dodaj jedno, aby zacząć zasilać pamięć.',
   'memorySources.customSources': 'Własne źródła',
diff --git a/app/src/lib/i18n/pt.ts b/app/src/lib/i18n/pt.ts
index 59d755cf8..04c6c1cc1 100644
--- a/app/src/lib/i18n/pt.ts
+++ b/app/src/lib/i18n/pt.ts
@@ -2004,6 +2004,13 @@ const messages: TranslationMap = {
   'sync.failedToLoad': 'Falha ao carregar status de sincronização',
   'sync.noContent':
     'Nenhum conteúdo foi sincronizado na memória ainda. Conecte uma integração para começar.',
+  'memorySyncInterval.title': 'Agenda de sincronização',
+  'memorySyncInterval.lastSynced': 'Última sincronização',
+  'memorySyncInterval.never': 'nunca',
+  'memorySyncInterval.everyHours': 'A cada {h} h',
+  'memorySyncInterval.everyMinutes': 'A cada {m} min',
+  'memorySyncInterval.manual': 'Apenas manual',
+  'memorySyncInterval.saveFailed': 'Falha ao atualizar a agenda de sincronização',
   'memorySources.title': 'Fontes de Memória',
   'memorySources.empty':
     'Ainda não há fontes de memória. Adicione uma para começar a alimentar a memória.',
diff --git a/app/src/lib/i18n/ru.ts b/app/src/lib/i18n/ru.ts
index 3d54b6b6c..0ca703f59 100644
--- a/app/src/lib/i18n/ru.ts
+++ b/app/src/lib/i18n/ru.ts
@@ -1978,6 +1978,13 @@ const messages: TranslationMap = {
   'sync.sync': 'Синхронизировать',
   'sync.failedToLoad': 'Не удалось загрузить статус синхронизации',
   'sync.noContent': 'Контент в память ещё не синхронизирован. Подключи интеграцию для начала.',
+  'memorySyncInterval.title': 'Расписание синхронизации',
+  'memorySyncInterval.lastSynced': 'Последняя синхронизация',
+  'memorySyncInterval.never': 'никогда',
+  'memorySyncInterval.everyHours': 'Каждые {h} ч',
+  'memorySyncInterval.everyMinutes': 'Каждые {m} мин',
+  'memorySyncInterval.manual': 'Только вручную',
+  'memorySyncInterval.saveFailed': 'Не удалось обновить расписание синхронизации',
   'memorySources.title': 'Источники памяти',
   'memorySources.empty': 'Источников памяти пока нет. Добавьте один, чтобы начать кормить память.',
   'memorySources.customSources': 'Пользовательские источники',
diff --git a/app/src/lib/i18n/zh-CN.ts b/app/src/lib/i18n/zh-CN.ts
index 2a72eda39..3ae81a588 100644
--- a/app/src/lib/i18n/zh-CN.ts
+++ b/app/src/lib/i18n/zh-CN.ts
@@ -1865,6 +1865,13 @@ const messages: TranslationMap = {
   'sync.sync': '同步',
   'sync.failedToLoad': '加载失败',
   'sync.noContent': '无可用内容',
+  'memorySyncInterval.title': '同步计划',
+  'memorySyncInterval.lastSynced': '上次同步',
+  'memorySyncInterval.never': '从不',
+  'memorySyncInterval.everyHours': '每 {h} 小时',
+  'memorySyncInterval.everyMinutes': '每 {m} 分钟',
+  'memorySyncInterval.manual': '仅手动',
+  'memorySyncInterval.saveFailed': '更新同步计划失败',
   'memorySources.title': '记忆来源',
   'memorySources.empty': '暂无记忆来源。添加一个来源即可开始注入记忆。',
   'memorySources.customSources': '自定义来源',
diff --git a/app/src/services/rpcMethods.ts b/app/src/services/rpcMethods.ts
index 6b6bebcdd..e7417a9fe 100644
--- a/app/src/services/rpcMethods.ts
+++ b/app/src/services/rpcMethods.ts
@@ -7,6 +7,7 @@ export const CORE_RPC_METHODS = {
   configGetComposioTriggerSettings: 'openhuman.config_get_composio_trigger_settings',
   configGetDashboardSettings: 'openhuman.config_get_dashboard_settings',
   configGetRuntimeFlags: 'openhuman.config_get_runtime_flags',
+  configGetMemorySyncSettings: 'openhuman.config_get_memory_sync_settings',
   configGetSandboxSettings: 'openhuman.config_get_sandbox_settings',
   configGetSearchSettings: 'openhuman.config_get_search_settings',
   configUpdateSearchSettings: 'openhuman.config_update_search_settings',
@@ -19,6 +20,7 @@ export const CORE_RPC_METHODS = {
   configUpdateComposioTriggerSettings: 'openhuman.config_update_composio_trigger_settings',
   configUpdateLocalAiSettings: 'openhuman.config_update_local_ai_settings',
   configUpdateMemorySettings: 'openhuman.config_update_memory_settings',
+  configUpdateMemorySyncSettings: 'openhuman.config_update_memory_sync_settings',
   configUpdateModelSettings: 'openhuman.config_update_model_settings',
   configUpdateRuntimeSettings: 'openhuman.config_update_runtime_settings',
   configUpdateSandboxSettings: 'openhuman.config_update_sandbox_settings',
diff --git a/app/src/utils/tauriCommands/config.ts b/app/src/utils/tauriCommands/config.ts
index 0890778a9..db1cc3e77 100644
--- a/app/src/utils/tauriCommands/config.ts
+++ b/app/src/utils/tauriCommands/config.ts
@@ -526,6 +526,53 @@ export async function openhumanUpdateSandboxSettings(
   });
 }
 
+// ── Memory sync schedule (#3302) ─────────────────────────────────────────────
+
+/** Global memory-sync schedule returned by config_get_memory_sync_settings. */
+export interface MemorySyncSettings {
+  /** Stored value: null = use the default cadence, 0 = Manual only, n>0 = seconds. */
+  sync_interval_secs: number | null;
+  /** Resolved cadence to highlight in the UI (the default when unset; 0 for manual). */
+  selected_secs: number;
+  /** True when the user picked "Manual only" (stored value is 0). */
+  is_manual: boolean;
+  /** True when no explicit choice is stored (falls back to `default_secs`). */
+  is_default: boolean;
+  /** The effective default cadence (seconds) applied when unset (24h). */
+  default_secs: number;
+  /** Preset cadences (seconds) offered in the UI: 4h / 12h / 24h. */
+  presets: number[];
+}
+
+/** Partial update — set `sync_interval_secs` to `null` to reset to default. */
+export interface MemorySyncSettingsUpdate {
+  /** null = default, 0 = Manual only, n>0 = sync every n seconds. */
+  sync_interval_secs?: number | null;
+}
+
+export async function openhumanGetMemorySyncSettings(): Promise<
+  CommandResponse<MemorySyncSettings>
+> {
+  if (!isTauri()) {
+    throw new Error('Not running in Tauri');
+  }
+  return await callCoreRpc<CommandResponse<MemorySyncSettings>>({
+    method: CORE_RPC_METHODS.configGetMemorySyncSettings,
+  });
+}
+
+export async function openhumanUpdateMemorySyncSettings(
+  update: MemorySyncSettingsUpdate
+): Promise<CommandResponse<MemorySyncSettings>> {
+  if (!isTauri()) {
+    throw new Error('Not running in Tauri');
+  }
+  return await callCoreRpc<CommandResponse<MemorySyncSettings>>({
+    method: CORE_RPC_METHODS.configUpdateMemorySyncSettings,
+    params: update,
+  });
+}
+
 // ── Agent execution settings (action/tool timeout) ──────────────────────────
 
 /** Agent execution settings as returned by config_get_agent_settings. */
diff --git a/app/test/e2e/specs/memory-sync-schedule.spec.ts b/app/test/e2e/specs/memory-sync-schedule.spec.ts
new file mode 100644
index 000000000..bb7eac6b0
--- /dev/null
+++ b/app/test/e2e/specs/memory-sync-schedule.spec.ts
@@ -0,0 +1,112 @@
+import { browser, expect } from '@wdio/globals';
+
+import { waitForApp } from '../helpers/app-helpers';
+import { waitForTestId } from '../helpers/element-helpers';
+import { isTauriDriver } from '../helpers/platform';
+import { resetApp } from '../helpers/reset-app';
+import { startMockServer, stopMockServer } from '../mock-server';
+
+/**
+ * E2E for the global memory-sync schedule control (#3302).
+ *
+ * Drives the real React UI + in-process core: navigate to Intelligence →
+ * Memory, confirm the schedule defaults to "Every 24h", pick the 4h preset,
+ * confirm the summary updates, then re-navigate to prove the choice persisted
+ * through `config_update_memory_sync_settings` / `config_get_memory_sync_settings`.
+ *
+ * DOM-testid assertions only run on the tauri-driver (Linux CI) lane; the macOS
+ * Appium Mac2 lane self-skips, matching the other DOM-driven intelligence specs.
+ */
+function stepLog(message: string, context?: unknown): void {
+  const stamp = new Date().toISOString();
+  if (context === undefined) {
+    console.log(`[MemorySyncScheduleE2E][${stamp}] ${message}`);
+    return;
+  }
+  console.log(`[MemorySyncScheduleE2E][${stamp}] ${message}`, JSON.stringify(context, null, 2));
+}
+
+async function gotoMemoryWorkspace(): Promise<void> {
+  // HashRouter + useSearchParams: the Memory tab lives at
+  // `#/intelligence?tab=memory`, whose default sub-tab renders the
+  // MemoryWorkspace (and the MemorySourcesRegistry schedule control).
+  await browser.execute(() => {
+    window.location.hash = '/intelligence?tab=memory';
+  });
+  await browser.pause(2_000);
+}
+
+describe('Memory sync schedule', () => {
+  before(async function () {
+    stepLog('Starting Memory Sync Schedule E2E');
+    await startMockServer();
+    await waitForApp();
+    await resetApp('e2e-memory-sync-user');
+  });
+
+  after(async () => {
+    await stopMockServer();
+  });
+
+  it('defaults to Every 24h and persists a picked preset', async function () {
+    if (!isTauriDriver()) {
+      this.skip();
+      return;
+    }
+
+    await gotoMemoryWorkspace();
+
+    // The schedule control renders independent of any connected sources.
+    const schedule = await waitForTestId('memory-sync-schedule');
+    expect(await schedule.isExisting()).toBe(true);
+
+    // Default (unset) resolves to the 24h preset being selected.
+    const preset24h = await waitForTestId('memory-sync-preset-86400');
+    expect(await preset24h.getAttribute('aria-checked')).toBe('true');
+
+    const current = await waitForTestId('memory-sync-current');
+    expect(await current.getText()).toContain('Every 24h');
+
+    // Pick the 4h preset — writes config_update_memory_sync_settings.
+    const preset4h = await waitForTestId('memory-sync-preset-14400');
+    await preset4h.click();
+
+    // The summary reflects the new cadence and the 4h preset becomes selected.
+    await browser.waitUntil(
+      async () => {
+        const el = await waitForTestId('memory-sync-current');
+        return (await el.getText()).includes('Every 4h');
+      },
+      { timeout: 10_000, timeoutMsg: 'sync summary did not update to "Every 4h"' }
+    );
+    expect(
+      await (await waitForTestId('memory-sync-preset-14400')).getAttribute('aria-checked')
+    ).toBe('true');
+
+    // Navigate away and back to prove the value was persisted server-side.
+    await browser.execute(() => {
+      window.location.hash = '/intelligence?tab=tasks';
+    });
+    await browser.pause(1_000);
+    await gotoMemoryWorkspace();
+
+    const reloaded = await waitForTestId('memory-sync-current');
+    expect(await reloaded.getText()).toContain('Every 4h');
+    expect(
+      await (await waitForTestId('memory-sync-preset-14400')).getAttribute('aria-checked')
+    ).toBe('true');
+
+    // Switch to Manual only and confirm the summary flips.
+    const manual = await waitForTestId('memory-sync-preset-0');
+    await manual.click();
+    await browser.waitUntil(
+      async () => {
+        const el = await waitForTestId('memory-sync-current');
+        return (await el.getText()).includes('Manual only');
+      },
+      { timeout: 10_000, timeoutMsg: 'sync summary did not update to "Manual only"' }
+    );
+
+    stepLog('Memory sync schedule preset + persistence verified');
+  });
+});
diff --git a/src/openhuman/about_app/catalog_data.rs b/src/openhuman/about_app/catalog_data.rs
index 7c8f6e666..2ac0dd99d 100644
--- a/src/openhuman/about_app/catalog_data.rs
+++ b/src/openhuman/about_app/catalog_data.rs
@@ -384,6 +384,25 @@ pub(super) const CAPABILITIES: &[Capability] = &[
         status: CapabilityStatus::Beta,
         privacy: LOCAL_RAW,
     },
+    Capability {
+        id: "intelligence.memory_sync_schedule",
+        name: "Memory Sync Schedule",
+        domain: "config",
+        category: CapabilityCategory::Intelligence,
+        description: "Pick a single global cadence for how often all opted-in memory sources \
+            auto-sync, presented like a backup schedule (\"Last synced … · Sync every …\"). \
+            Presets are every 4h / 12h / 24h, plus \"Manual only\" which disables background \
+            auto-sync entirely (you can still sync on demand). The chosen interval overrides each \
+            provider's built-in cadence but is floored at it, so syncs never run more often than \
+            the provider intends — handy for keeping credit spend predictable. Unset defaults to \
+            every 24h.",
+        how_to: "Intelligence > Memory Sources — choose a Sync every… preset or Manual only. \
+            Programmatic: openhuman.config_get_memory_sync_settings / \
+            openhuman.config_update_memory_sync_settings (RPC); ops override via the \
+            OPENHUMAN_MEMORY_SYNC_INTERVAL_SECS env var (0 = manual).",
+        status: CapabilityStatus::Beta,
+        privacy: LOCAL_RAW,
+    },
     Capability {
         id: "intelligence.embedding_provider_config",
         name: "Configure Embedding Provider",
diff --git a/src/openhuman/config/mod.rs b/src/openhuman/config/mod.rs
index b91d142ad..3ec7ac135 100644
--- a/src/openhuman/config/mod.rs
+++ b/src/openhuman/config/mod.rs
@@ -46,10 +46,11 @@ pub use schema::{
     SearchEngineCredentials, SearxngConfig, SecretsConfig, SecurityConfig, SlackConfig,
     StorageConfig, StorageProviderConfig, StorageProviderSection, StreamMode, TeamModelConfig,
     TelegramConfig, UpdateConfig, UpdateRestartStrategy, VoiceActivationMode, VoiceServerConfig,
-    WebSearchConfig, WebhookConfig, DEFAULT_CLOUD_LLM_MODEL, DEFAULT_MODEL, MODEL_AGENTIC_V1,
-    MODEL_CHAT_V1, MODEL_CODING_V1, MODEL_REASONING_QUICK_V1, MODEL_REASONING_V1,
-    MODEL_SUMMARIZATION_V1, SEARCH_ENGINE_BRAVE, SEARCH_ENGINE_DISABLED, SEARCH_ENGINE_MANAGED,
-    SEARCH_ENGINE_PARALLEL, SEARCH_ENGINE_QUERIT,
+    WebSearchConfig, WebhookConfig, DEFAULT_CLOUD_LLM_MODEL, DEFAULT_MEMORY_SYNC_INTERVAL_SECS,
+    DEFAULT_MODEL, MEMORY_SYNC_INTERVAL_PRESETS_SECS, MODEL_AGENTIC_V1, MODEL_CHAT_V1,
+    MODEL_CODING_V1, MODEL_REASONING_QUICK_V1, MODEL_REASONING_V1, MODEL_SUMMARIZATION_V1,
+    SEARCH_ENGINE_BRAVE, SEARCH_ENGINE_DISABLED, SEARCH_ENGINE_MANAGED, SEARCH_ENGINE_PARALLEL,
+    SEARCH_ENGINE_QUERIT,
 };
 pub use schemas::{
     all_controller_schemas as all_config_controller_schemas,
diff --git a/src/openhuman/config/ops.rs b/src/openhuman/config/ops.rs
index 4681eaa23..71be7b97d 100644
--- a/src/openhuman/config/ops.rs
+++ b/src/openhuman/config/ops.rs
@@ -1180,6 +1180,81 @@ pub async fn load_and_apply_activity_level_settings(
     apply_activity_level_settings(&mut config, update).await
 }
 
+/// Patch for the global memory-sync cadence (#3302).
+///
+/// `sync_interval_secs` carries the new value to store in
+/// [`Config::memory_sync_interval_secs`]:
+/// - omitted / `null` → reset to "use the default cadence" (`None`)
+/// - `0` → "Manual only" (periodic auto-sync disabled)
+/// - `n > 0` → sync every `n` seconds (applied per source as a floor over the
+///   provider default by the scheduler)
+#[derive(Debug, Default)]
+pub struct MemorySyncSettingsPatch {
+    pub sync_interval_secs: Option<u64>,
+}
+
+/// Build the JSON view of the memory-sync settings shared by get + apply.
+fn memory_sync_settings_value(stored: Option<u64>) -> serde_json::Value {
+    let is_manual = stored == Some(0);
+    let is_default = stored.is_none();
+    // The cadence the UI should highlight: the stored value when set, else the
+    // resolved 24h default. `0` (manual) is surfaced verbatim so the UI can
+    // select the "Manual only" option.
+    let selected_secs =
+        stored.unwrap_or(crate::openhuman::config::DEFAULT_MEMORY_SYNC_INTERVAL_SECS);
+    json!({
+        "sync_interval_secs": stored,
+        "selected_secs": selected_secs,
+        "is_manual": is_manual,
+        "is_default": is_default,
+        "default_secs": crate::openhuman::config::DEFAULT_MEMORY_SYNC_INTERVAL_SECS,
+        "presets": crate::openhuman::config::MEMORY_SYNC_INTERVAL_PRESETS_SECS,
+    })
+}
+
+/// Returns the current global memory-sync cadence and its derived view.
+pub async fn get_memory_sync_settings() -> Result<RpcOutcome<serde_json::Value>, String> {
+    let config = load_config_with_timeout().await?;
+    let value = memory_sync_settings_value(config.memory_sync_interval_secs);
+    Ok(RpcOutcome::single_log(value, "memory sync settings read"))
+}
+
+/// Updates the global memory-sync cadence and persists it. The running
+/// scheduler reads `config.memory_sync_interval_secs` fresh on each tick, so
+/// the new cadence takes effect from the next tick without a restart.
+pub async fn apply_memory_sync_settings(
+    config: &mut Config,
+    update: MemorySyncSettingsPatch,
+) -> Result<RpcOutcome<serde_json::Value>, String> {
+    config.memory_sync_interval_secs = update.sync_interval_secs;
+    config.save().await.map_err(|e| e.to_string())?;
+
+    tracing::info!(
+        sync_interval_secs = ?config.memory_sync_interval_secs,
+        "[config:memory_sync] memory sync interval updated"
+    );
+
+    let stored = config.memory_sync_interval_secs;
+    let value = memory_sync_settings_value(stored);
+    let msg = match stored {
+        Some(0) => "memory sync set to Manual only".to_string(),
+        Some(n) => format!("memory sync interval set to {n}s"),
+        None => "memory sync interval reset to default".to_string(),
+    };
+    Ok(RpcOutcome::new(
+        value,
+        vec![format!("{msg} — saved to {}", config.config_path.display())],
+    ))
+}
+
+/// Loads the configuration, applies memory-sync settings, and saves it.
+pub async fn load_and_apply_memory_sync_settings(
+    update: MemorySyncSettingsPatch,
+) -> Result<RpcOutcome<serde_json::Value>, String> {
+    let mut config = load_config_with_timeout().await?;
+    apply_memory_sync_settings(&mut config, update).await
+}
+
 /// Serializes the load-modify-save in [`add_auto_approve_tool`] so two
 /// concurrent "Always allow" appends (different tools) can't read the same
 /// `auto_approve`, each push their own, and clobber the other on save
diff --git a/src/openhuman/config/ops_tests.rs b/src/openhuman/config/ops_tests.rs
index 421be43cd..03f1496e5 100644
--- a/src/openhuman/config/ops_tests.rs
+++ b/src/openhuman/config/ops_tests.rs
@@ -331,6 +331,64 @@ fn tmp_config(tmp: &tempfile::TempDir) -> Config {
     cfg
 }
 
+#[tokio::test]
+async fn apply_memory_sync_settings_stores_interval_and_view() {
+    let tmp = tempdir().unwrap();
+    let mut cfg = tmp_config(&tmp);
+
+    // Pick the 4h preset.
+    let patch = MemorySyncSettingsPatch {
+        sync_interval_secs: Some(14_400),
+    };
+    let outcome = apply_memory_sync_settings(&mut cfg, patch)
+        .await
+        .expect("apply");
+    assert_eq!(cfg.memory_sync_interval_secs, Some(14_400));
+    assert_eq!(outcome.value["sync_interval_secs"], 14_400);
+    assert_eq!(outcome.value["selected_secs"], 14_400);
+    assert_eq!(outcome.value["is_manual"], false);
+    assert_eq!(outcome.value["is_default"], false);
+}
+
+#[tokio::test]
+async fn apply_memory_sync_settings_manual_only() {
+    let tmp = tempdir().unwrap();
+    let mut cfg = tmp_config(&tmp);
+
+    let patch = MemorySyncSettingsPatch {
+        sync_interval_secs: Some(0),
+    };
+    let outcome = apply_memory_sync_settings(&mut cfg, patch)
+        .await
+        .expect("apply");
+    assert_eq!(cfg.memory_sync_interval_secs, Some(0));
+    assert_eq!(outcome.value["is_manual"], true);
+    assert_eq!(outcome.value["sync_interval_secs"], 0);
+}
+
+#[tokio::test]
+async fn apply_memory_sync_settings_reset_to_default() {
+    let tmp = tempdir().unwrap();
+    let mut cfg = tmp_config(&tmp);
+    cfg.memory_sync_interval_secs = Some(43_200);
+
+    // Omitted field → None → reset to default.
+    let patch = MemorySyncSettingsPatch {
+        sync_interval_secs: None,
+    };
+    let outcome = apply_memory_sync_settings(&mut cfg, patch)
+        .await
+        .expect("apply");
+    assert_eq!(cfg.memory_sync_interval_secs, None);
+    assert_eq!(outcome.value["is_default"], true);
+    assert!(outcome.value["sync_interval_secs"].is_null());
+    // The UI still gets a concrete cadence to highlight (the 24h default).
+    assert_eq!(
+        outcome.value["selected_secs"],
+        crate::openhuman::config::DEFAULT_MEMORY_SYNC_INTERVAL_SECS
+    );
+}
+
 #[tokio::test]
 async fn apply_model_settings_updates_fields_and_persists_snapshot() {
     let tmp = tempdir().unwrap();
diff --git a/src/openhuman/config/schema/load.rs b/src/openhuman/config/schema/load.rs
index 791823da5..464da83e3 100644
--- a/src/openhuman/config/schema/load.rs
+++ b/src/openhuman/config/schema/load.rs
@@ -136,6 +136,11 @@ pub const PROJECTS_DIR_ENV_VAR: &str = "OPENHUMAN_PROJECTS_DIR";
 /// Environment override for the agent action sandbox directory.
 pub const ACTION_DIR_ENV_VAR: &str = "OPENHUMAN_ACTION_DIR";
 
+/// Environment override for the global memory-sync cadence (seconds).
+/// `0` means "Manual only". See issue #3302 and
+/// [`Config::memory_sync_interval_secs`].
+pub const MEMORY_SYNC_INTERVAL_SECS_ENV_VAR: &str = "OPENHUMAN_MEMORY_SYNC_INTERVAL_SECS";
+
 /// The agent's default **projects home** — a visible, read-write directory
 /// (`~/OpenHuman/projects`) where the coding agent creates and saves projects,
 /// kept distinct from the hidden internal state dir (`~/.openhuman/workspace`,
@@ -1444,6 +1449,24 @@ impl Config {
             }
         }
 
+        // Global memory-sync cadence override (#3302). `0` is honoured here
+        // (unlike the per-provider `OPENHUMAN_COMPOSIO_*_SYNC_INTERVAL_SECS`)
+        // because it carries the "Manual only" meaning. A non-numeric value
+        // is warned-and-ignored, leaving the persisted/None value intact.
+        if let Some(raw) = env.get(MEMORY_SYNC_INTERVAL_SECS_ENV_VAR) {
+            let trimmed = raw.trim();
+            if !trimmed.is_empty() {
+                match trimmed.parse::<u64>() {
+                    Ok(secs) => self.memory_sync_interval_secs = Some(secs),
+                    Err(_) => tracing::warn!(
+                        env = %MEMORY_SYNC_INTERVAL_SECS_ENV_VAR,
+                        value = %raw,
+                        "invalid memory-sync interval ignored; expected an unsigned integer (0 = manual)"
+                    ),
+                }
+            }
+        }
+
         if let Some(language) = env.get("OPENHUMAN_OUTPUT_LANGUAGE") {
             let language = language.trim();
             if !language.is_empty() {
diff --git a/src/openhuman/config/schema/load_tests.rs b/src/openhuman/config/schema/load_tests.rs
index eaf0df6ae..83461b049 100644
--- a/src/openhuman/config/schema/load_tests.rs
+++ b/src/openhuman/config/schema/load_tests.rs
@@ -567,6 +567,29 @@ fn env_overlay_autonomy_max_actions_per_hour_accepts_valid_u32() {
     );
 }
 
+#[test]
+fn env_overlay_memory_sync_interval_parses_and_honours_zero() {
+    let mut cfg = Config::default();
+    assert!(cfg.memory_sync_interval_secs.is_none());
+
+    // A positive value is stored verbatim.
+    cfg.apply_env_overlay_with(&HashMapEnv::new().with(MEMORY_SYNC_INTERVAL_SECS_ENV_VAR, "14400"));
+    assert_eq!(cfg.memory_sync_interval_secs, Some(14_400));
+
+    // `0` is honoured as the "Manual only" sentinel (unlike the per-provider
+    // override which rejects it).
+    cfg.apply_env_overlay_with(&HashMapEnv::new().with(MEMORY_SYNC_INTERVAL_SECS_ENV_VAR, "0"));
+    assert_eq!(cfg.memory_sync_interval_secs, Some(0));
+
+    // A non-numeric value is ignored, leaving the previous value intact.
+    cfg.apply_env_overlay_with(&HashMapEnv::new().with(MEMORY_SYNC_INTERVAL_SECS_ENV_VAR, "nope"));
+    assert_eq!(cfg.memory_sync_interval_secs, Some(0));
+
+    // A blank value is ignored too.
+    cfg.apply_env_overlay_with(&HashMapEnv::new().with(MEMORY_SYNC_INTERVAL_SECS_ENV_VAR, "  "));
+    assert_eq!(cfg.memory_sync_interval_secs, Some(0));
+}
+
 #[test]
 fn env_overlay_output_language_accepts_non_empty_value() {
     let mut cfg = Config::default();
diff --git a/src/openhuman/config/schema/types.rs b/src/openhuman/config/schema/types.rs
index db655ab90..87e2a4c11 100644
--- a/src/openhuman/config/schema/types.rs
+++ b/src/openhuman/config/schema/types.rs
@@ -23,6 +23,16 @@ pub const MODEL_SUMMARIZATION_V1: &str = "summarization-v1";
 /// reasoning is needed.
 pub const DEFAULT_MODEL: &str = MODEL_CHAT_V1;
 
+/// Effective default global memory-sync cadence (seconds) used when
+/// [`Config::memory_sync_interval_secs`] is `None` — i.e. the user has not
+/// explicitly picked a schedule. 24h, matching the "Sync every 24h" preset
+/// surfaced in the Memory Sources UI. See issue #3302.
+pub const DEFAULT_MEMORY_SYNC_INTERVAL_SECS: u64 = 86_400;
+
+/// Preset memory-sync cadences (seconds) offered in the UI: 4h / 12h / 24h.
+/// "Manual only" is represented separately by `Some(0)`. See issue #3302.
+pub const MEMORY_SYNC_INTERVAL_PRESETS_SECS: [u64; 3] = [14_400, 43_200, 86_400];
+
 #[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
 pub struct ModelRegistryEntry {
     pub id: String,
@@ -132,6 +142,23 @@ pub struct Config {
     #[serde(default)]
     pub agent_activity_level: AgentActivityLevel,
 
+    /// Global memory-sync cadence applied to **all** opted-in memory
+    /// sources, presented to the user like a backup schedule ("Sync
+    /// every 4h / 12h / 24h", plus "Manual only"). See issue #3302.
+    ///
+    /// Semantics consumed by `memory_sync::composio::periodic`:
+    /// - `None` — no explicit user choice; the effective cadence falls
+    ///   back to [`DEFAULT_MEMORY_SYNC_INTERVAL_SECS`] (24h).
+    /// - `Some(0)` — **Manual only**: the periodic scheduler skips
+    ///   auto-sync entirely; manual `memory_sources_sync` still works.
+    /// - `Some(n)` — sync every `n` seconds, applied per connection as
+    ///   `max(n, provider_default)` so it overrides the provider's own
+    ///   cadence while never syncing more often than the provider intends.
+    ///
+    /// Overridable via `OPENHUMAN_MEMORY_SYNC_INTERVAL_SECS` (`0` = manual).
+    #[serde(default)]
+    pub memory_sync_interval_secs: Option<u64>,
+
     #[serde(default)]
     pub agent: AgentConfig,
 
@@ -677,6 +704,7 @@ impl Default for Config {
             scheduler: SchedulerConfig::default(),
             scheduler_gate: SchedulerGateConfig::default(),
             agent_activity_level: AgentActivityLevel::default(),
+            memory_sync_interval_secs: None,
             agent: AgentConfig::default(),
             orchestrator: OrchestratorModelConfig::default(),
             teams: HashMap::new(),
diff --git a/src/openhuman/config/schemas.rs b/src/openhuman/config/schemas.rs
index 9f699dddd..908cbee87 100644
--- a/src/openhuman/config/schemas.rs
+++ b/src/openhuman/config/schemas.rs
@@ -284,6 +284,8 @@ pub fn all_controller_schemas() -> Vec<ControllerSchema> {
         schemas("get_search_settings"),
         schemas("get_activity_level_settings"),
         schemas("update_activity_level_settings"),
+        schemas("get_memory_sync_settings"),
+        schemas("update_memory_sync_settings"),
         schemas("get_sandbox_settings"),
         schemas("update_sandbox_settings"),
     ]
@@ -447,6 +449,14 @@ pub fn all_registered_controllers() -> Vec<RegisteredController> {
             schema: schemas("update_activity_level_settings"),
             handler: handle_update_activity_level_settings,
         },
+        RegisteredController {
+            schema: schemas("get_memory_sync_settings"),
+            handler: handle_get_memory_sync_settings,
+        },
+        RegisteredController {
+            schema: schemas("update_memory_sync_settings"),
+            handler: handle_update_memory_sync_settings,
+        },
         RegisteredController {
             schema: schemas("get_sandbox_settings"),
             handler: handle_get_sandbox_settings,
@@ -971,6 +981,25 @@ pub fn schemas(function: &str) -> ControllerSchema {
             inputs: vec![optional_string("level", "Activity level: off | minimal | moderate | active | always_on (or 0–4).")],
             outputs: vec![json_output("settings", "Updated activity level settings with cost estimates.")],
         },
+        "get_memory_sync_settings" => ControllerSchema {
+            namespace: "config",
+            function: "get_memory_sync_settings",
+            description: "Get the global memory-sync cadence applied to all opted-in sources: stored value, resolved selected cadence, manual/default flags, the 24h default, and the preset options (4h/12h/24h).",
+            inputs: vec![],
+            outputs: vec![json_output("settings", "Memory sync schedule settings.")],
+        },
+        "update_memory_sync_settings" => ControllerSchema {
+            namespace: "config",
+            function: "update_memory_sync_settings",
+            description: "Set the global memory-sync cadence. Omit/null resets to the default; 0 means Manual only (auto-sync disabled); a positive value is seconds between syncs. Takes effect on the next scheduler tick.",
+            inputs: vec![FieldSchema {
+                name: "sync_interval_secs",
+                ty: TypeSchema::Option(Box::new(TypeSchema::U64)),
+                comment: "Seconds between auto-syncs. null = default (24h); 0 = Manual only; n>0 = sync every n seconds.",
+                required: false,
+            }],
+            outputs: vec![json_output("settings", "Updated memory sync schedule settings.")],
+        },
         "get_sandbox_settings" => ControllerSchema {
             namespace: "config",
             function: "get_sandbox_settings",
@@ -1862,6 +1891,25 @@ fn handle_update_activity_level_settings(params: Map<String, Value>) -> Controll
     })
 }
 
+#[derive(Debug, Deserialize)]
+struct MemorySyncSettingsUpdate {
+    sync_interval_secs: Option<u64>,
+}
+
+fn handle_get_memory_sync_settings(_params: Map<String, Value>) -> ControllerFuture {
+    Box::pin(async move { to_json(config_rpc::get_memory_sync_settings().await?) })
+}
+
+fn handle_update_memory_sync_settings(params: Map<String, Value>) -> ControllerFuture {
+    Box::pin(async move {
+        let update = deserialize_params::<MemorySyncSettingsUpdate>(params)?;
+        let patch = config_rpc::MemorySyncSettingsPatch {
+            sync_interval_secs: update.sync_interval_secs,
+        };
+        to_json(config_rpc::load_and_apply_memory_sync_settings(patch).await?)
+    })
+}
+
 #[derive(Debug, Deserialize)]
 struct SandboxSettingsUpdate {
     backend: Option<String>,
diff --git a/src/openhuman/config/schemas_tests.rs b/src/openhuman/config/schemas_tests.rs
index 6a4df22e4..97e9ffb7c 100644
--- a/src/openhuman/config/schemas_tests.rs
+++ b/src/openhuman/config/schemas_tests.rs
@@ -182,6 +182,23 @@ fn autonomy_settings_rpc_is_registered() {
     assert!(funcs.contains(&"update_autonomy_settings"));
 }
 
+#[test]
+fn memory_sync_settings_rpc_is_registered() {
+    let funcs: Vec<&str> = all_controller_schemas()
+        .iter()
+        .map(|s| s.function)
+        .collect();
+    assert!(funcs.contains(&"get_memory_sync_settings"));
+    assert!(funcs.contains(&"update_memory_sync_settings"));
+    // The handler registry must stay in lockstep with the schema list.
+    let handlers: Vec<&str> = all_registered_controllers()
+        .iter()
+        .map(|h| h.schema.function)
+        .collect();
+    assert!(handlers.contains(&"get_memory_sync_settings"));
+    assert!(handlers.contains(&"update_memory_sync_settings"));
+}
+
 #[test]
 fn deserialize_params_parses_memory_settings_update() {
     let mut m = Map::new();
diff --git a/src/openhuman/memory_sync/composio/periodic.rs b/src/openhuman/memory_sync/composio/periodic.rs
index 557d031ac..b7da0f811 100644
--- a/src/openhuman/memory_sync/composio/periodic.rs
+++ b/src/openhuman/memory_sync/composio/periodic.rs
@@ -35,8 +35,10 @@
 //!     (bus subscribers, `on_connection_created`) via
 //!     [`record_sync_success`] so a recent non-periodic sync prevents
 //!     the scheduler from redundantly re-firing. The map is rebuilt on
-//!     restart, which is fine — a missed periodic sync is harmless
-//!     because the next tick after restart picks it back up immediately.
+//!     restart; to keep a user-configured cadence (e.g. "Sync every 24h",
+//!     #3302) from re-firing on every cold start, the due-check falls back
+//!     to the **persisted** sync-audit timestamp ([`read_audit_log`]) when
+//!     the in-memory record is absent — see [`persisted_since_last_sync`].
 //!   * Errors are logged and swallowed; the scheduler must never panic
 //!     out of its loop or periodic sync stops silently for the rest of
 //!     the process lifetime.
@@ -49,6 +51,7 @@ use std::time::{Duration, Instant};
 use tokio::time::interval;
 
 use crate::openhuman::config::rpc as config_rpc;
+use crate::openhuman::config::DEFAULT_MEMORY_SYNC_INTERVAL_SECS;
 use crate::openhuman::scheduler_gate::gate::current_policy;
 use crate::openhuman::scheduler_gate::policy::PauseReason;
 
@@ -57,7 +60,10 @@ use crate::openhuman::composio::client::{
     create_composio_client, direct_list_connections, ComposioClientKind,
 };
 use crate::openhuman::composio::ops;
-use crate::openhuman::memory_sync::sources::audit::{append_audit_entry, SyncAuditEntry};
+use crate::openhuman::memory_sync::sources::audit::{
+    append_audit_entry, read_audit_log, SyncAuditEntry,
+};
+use chrono::{DateTime, Utc};
 
 /// How often the scheduler wakes up to look for due syncs. Independent
 /// from per-provider `sync_interval_secs` — this just bounds how long
@@ -106,6 +112,86 @@ pub fn record_sync_success(toolkit: &str, connection_id: &str) {
     }
 }
 
+/// Resolve the effective periodic sync interval (seconds) for one connection,
+/// combining the provider's own default with the user's global
+/// memory-sync cadence ([`Config::memory_sync_interval_secs`], #3302).
+///
+/// - `global == Some(0)` → `None`: "Manual only" — the scheduler skips this
+///   source entirely (manual sync still works).
+/// - `global == Some(n)` → `Some(max(n, provider_default))`: the user's
+///   cadence overrides the provider default but is floored at it, so we never
+///   sync *more* often than the provider intended.
+/// - `global == None` → `Some(max(DEFAULT, provider_default))`: no explicit
+///   user choice, so fall back to the 24h default cadence (also floored at the
+///   provider default).
+fn effective_interval_secs(provider_default: u64, global: Option<u64>) -> Option<u64> {
+    match global {
+        Some(0) => None,
+        Some(n) => Some(n.max(provider_default)),
+        None => Some(DEFAULT_MEMORY_SYNC_INTERVAL_SECS.max(provider_default)),
+    }
+}
+
+/// Decide whether a connection is due for a periodic sync right now, given the
+/// effective interval and how long ago it last synced this run.
+///
+/// `since_last_sync == None` means we have no record of a sync this process
+/// lifetime, so we fire immediately (the restart-recovery path). Kept pure so
+/// the due-check can be simulated without driving the real `Instant` clock.
+fn connection_is_due(interval_secs: u64, since_last_sync: Option<Duration>) -> bool {
+    match since_last_sync {
+        Some(elapsed) => elapsed >= Duration::from_secs(interval_secs),
+        None => true,
+    }
+}
+
+/// Build an index of `connection_id → most recent successful Composio sync
+/// timestamp` from the persisted sync audit log (#3302).
+///
+/// The periodic loop writes audit entries with `source_id = connection_id` and
+/// `scope = "{toolkit}:{connection_id}"`; we accept either shape and key by the
+/// connection id. Only successful syncs count — matching the in-memory
+/// [`record_sync_success`] semantics, which never records a failed tick so the
+/// next tick retries. This is the wall-clock record that lets the cadence
+/// survive restarts (the in-memory monotonic map cannot).
+fn index_last_success_by_connection(entries: &[SyncAuditEntry]) -> HashMap<String, DateTime<Utc>> {
+    let mut idx: HashMap<String, DateTime<Utc>> = HashMap::new();
+    for e in entries {
+        if e.source_kind != "composio" || !e.success {
+            continue;
+        }
+        let connection_id = e
+            .scope
+            .rsplit_once(':')
+            .map(|(_, c)| c.to_string())
+            .filter(|c| !c.is_empty())
+            .unwrap_or_else(|| e.source_id.clone());
+        idx.entry(connection_id)
+            .and_modify(|t| {
+                if e.timestamp > *t {
+                    *t = e.timestamp;
+                }
+            })
+            .or_insert(e.timestamp);
+    }
+    idx
+}
+
+/// Wall-clock elapsed since a connection's last persisted successful sync, if
+/// any. Saturates at zero for a future timestamp (clock skew), so a skewed
+/// record never reads as "wildly overdue". Returns `None` when the connection
+/// has no persisted sync — letting the caller treat it as never-synced.
+fn persisted_since_last_sync(
+    idx: &HashMap<String, DateTime<Utc>>,
+    connection_id: &str,
+    now: DateTime<Utc>,
+) -> Option<Duration> {
+    idx.get(connection_id).map(|ts| {
+        let secs = (now - *ts).num_seconds().max(0) as u64;
+        Duration::from_secs(secs)
+    })
+}
+
 /// Spawn the periodic sync background task. Idempotent: only the
 /// first call actually spawns the loop, every subsequent call is a
 /// cheap no-op (logged at `debug` so it's visible during startup
@@ -278,6 +364,20 @@ pub(crate) async fn run_one_tick() -> Result<(), String> {
 
     let sync_map = last_sync_map();
 
+    // Global, user-configurable memory-sync cadence (#3302). Applied to every
+    // opted-in source as a floor/override over the provider's own default; a
+    // value of `Some(0)` disables periodic auto-sync ("Manual only").
+    let global_interval = config.memory_sync_interval_secs;
+
+    // Persisted last-sync fallback (#3302). The in-memory `LAST_SYNC_AT` map is
+    // rebuilt empty on every launch, so without this a cold start would re-fire
+    // every connection on the first tick — silently breaking the configured
+    // "Sync every 24h" gap across app restarts. We index the persisted sync
+    // audit log (wall-clock timestamps that survive restarts) and use it as the
+    // due-check fallback whenever the in-memory monotonic record is absent.
+    let audit_index = index_last_success_by_connection(&read_audit_log(&config));
+    let now = Utc::now();
+
     let mut considered = 0usize;
     let mut fired = 0usize;
     for conn in resp.connections {
@@ -296,20 +396,32 @@ pub(crate) async fn run_one_tick() -> Result<(), String> {
             continue;
         };
 
-        let Some(interval_secs) = provider.sync_interval_secs() else {
+        let Some(provider_default) = provider.sync_interval_secs() else {
             // Provider opted out of periodic sync entirely.
             continue;
         };
 
-        let key = (toolkit.clone(), conn.id.clone());
-        let due = {
-            let map = sync_map.lock().unwrap_or_else(|e| e.into_inner());
-            match map.get(&key) {
-                Some(when) => when.elapsed() >= Duration::from_secs(interval_secs),
-                None => true, // never synced this run — fire immediately
-            }
+        let Some(interval_secs) = effective_interval_secs(provider_default, global_interval) else {
+            // User selected "Manual only" — skip auto-sync for this source.
+            // Manual `memory_sources_sync` still works.
+            tracing::debug!(
+                toolkit = %toolkit,
+                connection_id = %conn.id,
+                "[composio:periodic] manual-only mode — skipping periodic sync"
+            );
+            continue;
         };
-        if !due {
+
+        let key = (toolkit.clone(), conn.id.clone());
+        // Prefer the in-memory monotonic record (most accurate within this run);
+        // fall back to the persisted audit timestamp so the configured cadence
+        // is honoured across restarts instead of re-firing on every cold start.
+        let since_last_sync = {
+            let map = sync_map.lock().unwrap_or_else(|e| e.into_inner());
+            map.get(&key).map(|when| when.elapsed())
+        }
+        .or_else(|| persisted_since_last_sync(&audit_index, &conn.id, now));
+        if !connection_is_due(interval_secs, since_last_sync) {
             continue;
         }
 
@@ -463,6 +575,219 @@ mod tests {
         assert!(TICK_SECONDS <= 3600);
     }
 
+    #[test]
+    fn effective_interval_none_falls_back_to_default() {
+        // No user choice → 24h default, floored at the provider default.
+        assert_eq!(
+            effective_interval_secs(15 * 60, None),
+            Some(DEFAULT_MEMORY_SYNC_INTERVAL_SECS)
+        );
+    }
+
+    #[test]
+    fn effective_interval_manual_disables_sync() {
+        // Some(0) is the "Manual only" sentinel — periodic sync is skipped.
+        assert_eq!(effective_interval_secs(15 * 60, Some(0)), None);
+    }
+
+    #[test]
+    fn effective_interval_override_is_floored_at_provider_default() {
+        // A user cadence longer than the provider default is honoured as-is.
+        assert_eq!(
+            effective_interval_secs(15 * 60, Some(4 * 3600)),
+            Some(4 * 3600)
+        );
+        // A user cadence shorter than the provider default is clamped up to it
+        // so we never sync more often than the provider intends.
+        assert_eq!(effective_interval_secs(30 * 60, Some(60)), Some(30 * 60));
+        // Exactly equal stays equal.
+        assert_eq!(effective_interval_secs(1800, Some(1800)), Some(1800));
+    }
+
+    #[test]
+    fn effective_interval_default_is_floored_at_a_longer_provider_default() {
+        // If a provider ever defaults to longer than 24h, that wins under None.
+        let long = DEFAULT_MEMORY_SYNC_INTERVAL_SECS + 3600;
+        assert_eq!(effective_interval_secs(long, None), Some(long));
+    }
+
+    #[test]
+    fn connection_is_due_compares_elapsed_against_interval() {
+        let interval = 4 * 3600;
+        // Never synced this run → always due.
+        assert!(connection_is_due(interval, None));
+        // Synced more recently than the interval → not due.
+        assert!(!connection_is_due(
+            interval,
+            Some(Duration::from_secs(3600))
+        ));
+        // Synced exactly at the interval boundary → due.
+        assert!(connection_is_due(
+            interval,
+            Some(Duration::from_secs(interval))
+        ));
+        // Synced longer ago than the interval → due.
+        assert!(connection_is_due(
+            interval,
+            Some(Duration::from_secs(interval + 1))
+        ));
+    }
+
+    /// End-to-end simulation of the scheduler's per-connection decision: prove
+    /// that **changing the global setting changes when the next sync fires**
+    /// (issue #3302 acceptance criterion). We drive the same two pure helpers
+    /// the live tick uses (`effective_interval_secs` → `connection_is_due`)
+    /// across realistic last-sync ages, so no clock or network is needed.
+    #[test]
+    fn scheduler_decision_honors_the_global_setting() {
+        // A chatty provider that natively wants to sync every 15 minutes.
+        let provider_default = 15 * 60;
+
+        // Helper mirroring the live loop: returns whether the connection would
+        // fire right now, or `None` for "Manual only" (skipped entirely).
+        let decide = |global: Option<u64>, since: Option<Duration>| -> Option<bool> {
+            effective_interval_secs(provider_default, global)
+                .map(|interval| connection_is_due(interval, since))
+        };
+
+        let one_hour_ago = Some(Duration::from_secs(3600));
+        let five_hours_ago = Some(Duration::from_secs(5 * 3600));
+
+        // Baseline (no global override): with only the 15m provider default, a
+        // connection synced an hour ago is already overdue and WOULD fire.
+        // (This is the behavior the feature is reining in.)
+        assert!(connection_is_due(provider_default, one_hour_ago));
+
+        // User picks "every 4h": now that same hour-old connection must NOT
+        // fire — the global cadence (not the 15m default) governs the gap…
+        assert_eq!(decide(Some(4 * 3600), one_hour_ago), Some(false));
+        // …but once 5h have passed it fires again.
+        assert_eq!(decide(Some(4 * 3600), five_hours_ago), Some(true));
+
+        // User picks "Manual only" (0): never auto-fires, no matter how stale.
+        assert_eq!(decide(Some(0), five_hours_ago), None);
+        assert_eq!(decide(Some(0), None), None);
+
+        // Unset (None) → 24h default: the hour-old connection is not yet due,
+        // confirming the default is far more conservative than the 15m native
+        // cadence.
+        assert_eq!(decide(None, one_hour_ago), Some(false));
+        assert_eq!(
+            decide(None, Some(Duration::from_secs(25 * 3600))),
+            Some(true)
+        );
+
+        // A never-synced connection fires on any non-manual setting (the
+        // restart-recovery path).
+        assert_eq!(decide(Some(4 * 3600), None), Some(true));
+    }
+
+    fn audit_entry(
+        connection_id: &str,
+        scope: &str,
+        success: bool,
+        ts: DateTime<Utc>,
+    ) -> SyncAuditEntry {
+        SyncAuditEntry {
+            timestamp: ts,
+            source_id: connection_id.to_string(),
+            source_kind: "composio".to_string(),
+            scope: scope.to_string(),
+            items_fetched: 1,
+            batches: 0,
+            input_tokens: 0,
+            output_tokens: 0,
+            estimated_cost_usd: 0.0,
+            composio_actions_called: 1,
+            composio_cost_usd: 0.0,
+            actual_charged_usd: None,
+            duration_ms: 10,
+            success,
+            error: None,
+        }
+    }
+
+    #[test]
+    fn index_last_success_keeps_latest_success_and_ignores_failures() {
+        let now = Utc::now();
+        let older = now - chrono::Duration::hours(6);
+        let newer = now - chrono::Duration::hours(1);
+        let entries = vec![
+            audit_entry("cmp-1", "gmail:cmp-1", true, older),
+            audit_entry("cmp-1", "gmail:cmp-1", true, newer), // newer success wins
+            audit_entry("cmp-1", "gmail:cmp-1", false, now),  // failure ignored
+            audit_entry("cmp-2", "slack:cmp-2", false, now),  // only-failure → absent
+        ];
+        let idx = index_last_success_by_connection(&entries);
+        assert_eq!(idx.get("cmp-1"), Some(&newer));
+        assert!(
+            !idx.contains_key("cmp-2"),
+            "a connection with only failed syncs is not indexed"
+        );
+    }
+
+    #[test]
+    fn index_last_success_falls_back_to_source_id_without_scope_suffix() {
+        let now = Utc::now();
+        // A non-composio kind is skipped entirely.
+        let entries = vec![
+            SyncAuditEntry {
+                source_kind: "github_repo".to_string(),
+                ..audit_entry("ignored", "github:org/repo", true, now)
+            },
+            // Composio entry whose scope has no ':' → key by source_id.
+            audit_entry("cmp-3", "noscope", true, now),
+        ];
+        let idx = index_last_success_by_connection(&entries);
+        assert!(idx.contains_key("cmp-3"));
+        assert!(!idx.contains_key("ignored"));
+    }
+
+    #[test]
+    fn persisted_since_last_sync_computes_and_saturates() {
+        let now = Utc::now();
+        let mut idx = HashMap::new();
+        idx.insert("cmp-1".to_string(), now - chrono::Duration::hours(3));
+        idx.insert("future".to_string(), now + chrono::Duration::hours(2));
+
+        let elapsed = persisted_since_last_sync(&idx, "cmp-1", now).unwrap();
+        // ~3h, allow a small window for test execution time.
+        assert!(elapsed >= Duration::from_secs(3 * 3600 - 5));
+        assert!(elapsed <= Duration::from_secs(3 * 3600 + 5));
+        // Clock skew (future timestamp) saturates to zero, not a huge value.
+        assert_eq!(
+            persisted_since_last_sync(&idx, "future", now),
+            Some(Duration::ZERO)
+        );
+        // Unknown connection → None (treated as never synced).
+        assert_eq!(persisted_since_last_sync(&idx, "unknown", now), None);
+    }
+
+    /// The cadence must survive a restart: with the in-memory map cold, the
+    /// persisted audit timestamp drives the due-check so a connection synced
+    /// 1h ago does NOT re-fire under a 4h setting, but one synced 5h ago does.
+    #[test]
+    fn cadence_survives_restart_via_persisted_audit() {
+        let now = Utc::now();
+        let mut idx = HashMap::new();
+        idx.insert("cmp-1".to_string(), now - chrono::Duration::hours(1));
+        idx.insert("cmp-2".to_string(), now - chrono::Duration::hours(5));
+
+        let interval = effective_interval_secs(15 * 60, Some(4 * 3600)).unwrap();
+
+        // cmp-1 (synced 1h ago) — in-memory cold, persisted fallback says NOT due.
+        let cmp1 = None.or_else(|| persisted_since_last_sync(&idx, "cmp-1", now));
+        assert!(!connection_is_due(interval, cmp1));
+
+        // cmp-2 (synced 5h ago) — persisted fallback says due.
+        let cmp2 = None.or_else(|| persisted_since_last_sync(&idx, "cmp-2", now));
+        assert!(connection_is_due(interval, cmp2));
+
+        // A connection with no persisted record still fires (truly fresh).
+        let fresh = None.or_else(|| persisted_since_last_sync(&idx, "cmp-new", now));
+        assert!(connection_is_due(interval, fresh));
+    }
+
     /// A successful periodic tick produces a Composio-kind audit entry that
     /// carries the billable-action tally + cost and zeroes the LLM-cost
     /// columns (summarisation happens later in the job worker). Pins the
diff --git a/tests/config_auth_app_state_connectivity_e2e.rs b/tests/config_auth_app_state_connectivity_e2e.rs
index a46282e44..ee0def022 100644
--- a/tests/config_auth_app_state_connectivity_e2e.rs
+++ b/tests/config_auth_app_state_connectivity_e2e.rs
@@ -2794,6 +2794,7 @@ async fn worker_a_controller_schemas_are_fully_exposed() {
                 "openhuman.config_get_data_paths",
                 "openhuman.config_get_dictation_settings",
                 "openhuman.config_get_meet_settings",
+                "openhuman.config_get_memory_sync_settings",
                 "openhuman.config_get_onboarding_completed",
                 "openhuman.config_get_runtime_flags",
                 "openhuman.config_get_sandbox_settings",
@@ -2814,6 +2815,7 @@ async fn worker_a_controller_schemas_are_fully_exposed() {
                 "openhuman.config_update_local_ai_settings",
                 "openhuman.config_update_meet_settings",
                 "openhuman.config_update_memory_settings",
+                "openhuman.config_update_memory_sync_settings",
                 "openhuman.config_update_model_settings",
                 "openhuman.config_update_runtime_settings",
                 "openhuman.config_update_sandbox_settings",
diff --git a/tests/json_rpc_e2e.rs b/tests/json_rpc_e2e.rs
index df9da6086..f5fde0b3c 100644
--- a/tests/json_rpc_e2e.rs
+++ b/tests/json_rpc_e2e.rs
@@ -10570,3 +10570,187 @@ async fn json_rpc_voice_server_settings_roundtrip_always_on_and_wake_word() {
 
     rpc_join.abort();
 }
+
+/// Memory-sync schedule (#3302): get defaults → set a 4h cadence → confirm it
+/// persists → switch to Manual only → confirm the flag flips.
+#[tokio::test]
+async fn json_rpc_memory_sync_settings_roundtrip_interval_and_manual() {
+    let _env_lock = json_rpc_e2e_env_lock();
+    let tmp = tempdir().expect("tempdir");
+    let home = tmp.path();
+    let openhuman_home = home.join(".openhuman");
+
+    let _home_guard = EnvVarGuard::set_to_path("HOME", home);
+    let _workspace_guard = EnvVarGuard::unset("OPENHUMAN_WORKSPACE");
+    let _backend_url_guard = EnvVarGuard::unset("BACKEND_URL");
+    let _vite_backend_guard = EnvVarGuard::unset("VITE_BACKEND_URL");
+    // The global override would mask the persisted value; keep it unset here.
+    let _interval_guard = EnvVarGuard::unset("OPENHUMAN_MEMORY_SYNC_INTERVAL_SECS");
+
+    write_min_config(&openhuman_home, "http://127.0.0.1:9");
+
+    let (rpc_addr, rpc_join) = serve_on_ephemeral(build_core_http_router(false)).await;
+    let rpc_base = format!("http://{}", rpc_addr);
+    tokio::time::sleep(Duration::from_millis(100)).await;
+
+    // GET defaults — unset stored value, but a resolved 24h selected cadence.
+    let initial = post_json_rpc(
+        &rpc_base,
+        7501,
+        "openhuman.config_get_memory_sync_settings",
+        json!({}),
+    )
+    .await;
+    let initial_outer = assert_no_jsonrpc_error(&initial, "get_memory_sync_settings initial");
+    let initial_result = initial_outer.get("result").unwrap_or(&initial_outer);
+    assert!(
+        initial_result.get("sync_interval_secs").map(Value::is_null) == Some(true),
+        "default stored value should be null, envelope: {initial_outer}"
+    );
+    assert_eq!(
+        initial_result.get("is_default").and_then(Value::as_bool),
+        Some(true),
+        "fresh config should report is_default=true, envelope: {initial_outer}"
+    );
+    assert_eq!(
+        initial_result.get("selected_secs").and_then(Value::as_u64),
+        Some(86_400),
+        "selected cadence should resolve to the 24h default, envelope: {initial_outer}"
+    );
+
+    // UPDATE — pick the 4h preset.
+    let update = post_json_rpc(
+        &rpc_base,
+        7502,
+        "openhuman.config_update_memory_sync_settings",
+        json!({ "sync_interval_secs": 14400 }),
+    )
+    .await;
+    let update_outer = assert_no_jsonrpc_error(&update, "update_memory_sync_settings 4h");
+    let update_result = update_outer.get("result").unwrap_or(&update_outer);
+    assert_eq!(
+        update_result
+            .get("sync_interval_secs")
+            .and_then(Value::as_u64),
+        Some(14_400),
+        "4h cadence should be stored, envelope: {update_outer}"
+    );
+    assert_eq!(
+        update_result.get("is_manual").and_then(Value::as_bool),
+        Some(false)
+    );
+
+    // GET again — the 4h cadence persists across the round-trip.
+    let after = post_json_rpc(
+        &rpc_base,
+        7503,
+        "openhuman.config_get_memory_sync_settings",
+        json!({}),
+    )
+    .await;
+    let after_outer = assert_no_jsonrpc_error(&after, "get_memory_sync_settings after 4h");
+    let after_result = after_outer.get("result").unwrap_or(&after_outer);
+    assert_eq!(
+        after_result
+            .get("sync_interval_secs")
+            .and_then(Value::as_u64),
+        Some(14_400),
+        "4h cadence should persist, envelope: {after_outer}"
+    );
+
+    // UPDATE — switch to Manual only (0).
+    let manual = post_json_rpc(
+        &rpc_base,
+        7504,
+        "openhuman.config_update_memory_sync_settings",
+        json!({ "sync_interval_secs": 0 }),
+    )
+    .await;
+    let manual_outer = assert_no_jsonrpc_error(&manual, "update_memory_sync_settings manual");
+    let manual_result = manual_outer.get("result").unwrap_or(&manual_outer);
+    assert_eq!(
+        manual_result.get("is_manual").and_then(Value::as_bool),
+        Some(true),
+        "0 should flip is_manual, envelope: {manual_outer}"
+    );
+
+    // GET once more — manual mode persisted (stored value 0, is_manual true).
+    let manual_get = post_json_rpc(
+        &rpc_base,
+        7505,
+        "openhuman.config_get_memory_sync_settings",
+        json!({}),
+    )
+    .await;
+    let manual_get_outer = assert_no_jsonrpc_error(&manual_get, "get_memory_sync_settings manual");
+    let manual_get_result = manual_get_outer.get("result").unwrap_or(&manual_get_outer);
+    assert_eq!(
+        manual_get_result.get("is_manual").and_then(Value::as_bool),
+        Some(true),
+        "manual mode should persist across a GET, envelope: {manual_get_outer}"
+    );
+    assert_eq!(
+        manual_get_result
+            .get("sync_interval_secs")
+            .and_then(Value::as_u64),
+        Some(0),
+        "manual stored value should be 0, envelope: {manual_get_outer}"
+    );
+
+    rpc_join.abort();
+}
+
+/// Ops / headless path (#3302): a fleet operator sets
+/// `OPENHUMAN_MEMORY_SYNC_INTERVAL_SECS` in the environment, and the running
+/// core surfaces that cadence through `config_get_memory_sync_settings` with no
+/// UI interaction. Verifies the env override flows all the way through the RPC.
+/// (The `0` = "Manual only" sentinel on the env path is covered at the parse
+/// layer by `env_overlay_memory_sync_interval_parses_and_honours_zero`.)
+#[tokio::test]
+async fn json_rpc_memory_sync_settings_env_override_is_reflected() {
+    let _env_lock = json_rpc_e2e_env_lock();
+    let tmp = tempdir().expect("tempdir");
+    let home = tmp.path();
+    let openhuman_home = home.join(".openhuman");
+
+    let _home_guard = EnvVarGuard::set_to_path("HOME", home);
+    let _workspace_guard = EnvVarGuard::unset("OPENHUMAN_WORKSPACE");
+    let _backend_url_guard = EnvVarGuard::unset("BACKEND_URL");
+    let _vite_backend_guard = EnvVarGuard::unset("VITE_BACKEND_URL");
+    // Operator sets an 8h cadence via the environment (not a UI write).
+    let _interval_guard = EnvVarGuard::set("OPENHUMAN_MEMORY_SYNC_INTERVAL_SECS", "28800");
+
+    write_min_config(&openhuman_home, "http://127.0.0.1:9");
+
+    let (rpc_addr, rpc_join) = serve_on_ephemeral(build_core_http_router(false)).await;
+    let rpc_base = format!("http://{}", rpc_addr);
+    tokio::time::sleep(Duration::from_millis(100)).await;
+
+    // GET reflects the env-provided cadence even though config.toml never set it.
+    let resp = post_json_rpc(
+        &rpc_base,
+        7601,
+        "openhuman.config_get_memory_sync_settings",
+        json!({}),
+    )
+    .await;
+    let outer = assert_no_jsonrpc_error(&resp, "get_memory_sync_settings env-override");
+    let result = outer.get("result").unwrap_or(&outer);
+    assert_eq!(
+        result.get("sync_interval_secs").and_then(Value::as_u64),
+        Some(28_800),
+        "env override should surface via RPC, envelope: {outer}"
+    );
+    assert_eq!(
+        result.get("selected_secs").and_then(Value::as_u64),
+        Some(28_800),
+        "selected cadence should match the env override, envelope: {outer}"
+    );
+    assert_eq!(
+        result.get("is_default").and_then(Value::as_bool),
+        Some(false),
+        "an env-provided value is not the default, envelope: {outer}"
+    );
+
+    rpc_join.abort();
+}