diff --git a/src/app/features/settings/notifications/PushNotifications.tsx b/src/app/features/settings/notifications/PushNotifications.tsx
index 7f510b444..be9e627fb 100644
--- a/src/app/features/settings/notifications/PushNotifications.tsx
+++ b/src/app/features/settings/notifications/PushNotifications.tsx
@@ -57,7 +57,7 @@ export async function enablePushNotifications(
       kind: 'http' as const,
       app_id: clientConfig.pushNotificationDetails?.webPushAppID,
       pushkey: keys.p256dh,
-      app_display_name: 'Cinny',
+      app_display_name: 'Sable',
       device_display_name: 'This Browser',
       lang: navigator.language || 'en',
       data: {
@@ -104,7 +104,7 @@ export async function enablePushNotifications(
     kind: 'http' as const,
     app_id: clientConfig.pushNotificationDetails?.webPushAppID,
     pushkey: keys.p256dh,
-    app_display_name: 'Cinny',
+    app_display_name: 'Sable',
     device_display_name:
       (await mx.getDevice(mx.getDeviceId() ?? '')).display_name ?? 'Unknown Device',
     lang: navigator.language || 'en',
diff --git a/src/app/pages/client/ClientRoot.tsx b/src/app/pages/client/ClientRoot.tsx
index 70ba9221e..72fa5ef3f 100644
--- a/src/app/pages/client/ClientRoot.tsx
+++ b/src/app/pages/client/ClientRoot.tsx
@@ -205,7 +205,7 @@ export function ClientRoot({ children }: ClientRootProps) {
       log.log('initClient for', activeSession.userId);
       const newMx = await initClient(activeSession);
       loadedUserIdRef.current = activeSession.userId;
-      pushSessionToSW(activeSession.baseUrl, activeSession.accessToken);
+      pushSessionToSW(activeSession.baseUrl, activeSession.accessToken, activeSession.userId);
       return newMx;
     }, [activeSession, activeSessionId, setActiveSessionId])
   );
@@ -234,7 +234,7 @@ export function ClientRoot({ children }: ClientRootProps) {
         activeSession.userId,
         '— reloading client'
       );
-      pushSessionToSW(activeSession.baseUrl, activeSession.accessToken);
+      pushSessionToSW(activeSession.baseUrl, activeSession.accessToken, activeSession.userId);
       if (mx?.clientRunning) {
         stopClient(mx);
       }
@@ -259,6 +259,28 @@ export function ClientRoot({ children }: ClientRootProps) {
   useLogoutListener(mx);
   useAppVisibility(mx);
 
+  // Keep the SW session warm so media fetches and push notifications work
+  // reliably after iOS kills and restarts the SW in the background.
+  // - Immediate resync whenever the tab comes back to the foreground.
+  // - Periodic heartbeat (10 min) keeps the persisted session up to date
+  //   while the app is running.
+  const swSessionBaseUrl = activeSession?.baseUrl;
+  const swSessionAccessToken = activeSession?.accessToken;
+  const swSessionUserId = activeSession?.userId;
+  useEffect(() => {
+    if (!swSessionBaseUrl || !swSessionAccessToken) return undefined;
+    const resync = () => pushSessionToSW(swSessionBaseUrl, swSessionAccessToken, swSessionUserId);
+    const handleVisibility = () => {
+      if (document.visibilityState === 'visible') resync();
+    };
+    document.addEventListener('visibilitychange', handleVisibility);
+    const timer = setInterval(resync, 10 * 60 * 1000);
+    return () => {
+      document.removeEventListener('visibilitychange', handleVisibility);
+      clearInterval(timer);
+    };
+  }, [swSessionBaseUrl, swSessionAccessToken, swSessionUserId]);
+
   useEffect(
     () => () => {
       if (mx?.clientRunning) {
diff --git a/src/client/initMatrix.ts b/src/client/initMatrix.ts
index 9e0496ee3..b35c8a4a7 100644
--- a/src/client/initMatrix.ts
+++ b/src/client/initMatrix.ts
@@ -802,5 +802,13 @@ export const clearLoginData = async () => {
     if (name) window.indexedDB.deleteDatabase(name);
   });
   window.localStorage.clear();
+
+  // Unregister all service workers so the next load starts fresh.
+  // Especially important on iOS/mobile where stale SWs can persist.
+  if ('serviceWorker' in navigator) {
+    const registrations = await navigator.serviceWorker.getRegistrations();
+    await Promise.all(registrations.map((r) => r.unregister()));
+  }
+
   window.location.reload();
 };