Missing app notifications can cause you to miss important messages, alerts, and updates. The fix is usually straightforward once you identify which layer of settings is blocking the notifications — device permissions, battery optimization, or app-specific settings.
- Why App Notifications Stop Working
- Step-by-Step Fixes for Notifications Not Working
- 1. Check App Notification Permissions
- 2. Disable Battery Optimization for the App
- 3. Check Do Not Disturb Settings
- 4. Enable Background App Refresh (iOS)
- 5. Clear App Cache and Check In-App Settings
- Frequently Asked Questions
- Why do I only get notifications when I open the app?
- Why are my notifications delayed by hours?
- Do I need to reinstall an app to fix notifications?
Why App Notifications Stop Working
| Cause | Symptoms | Fix | Difficulty | Priority |
|---|---|---|---|---|
| Notifications disabled in settings | No notifications from specific app | Enable in app notification settings | Easy | High |
| Battery optimization killing app | Notifications delayed or missing | Exclude app from battery optimization | Easy | High |
| Do Not Disturb mode active | No notifications from all apps | Disable DND or add app exceptions | Easy | High |
| App background refresh disabled | Notifications only when app is open | Enable background app refresh | Easy | Medium |
| Notification channels disabled | Some notification types missing | Enable specific notification channels | Easy | Medium |
Step-by-Step Fixes for Notifications Not Working
1. Check App Notification Permissions
Go to Settings → Apps → select the app → Notifications. Make sure notifications are enabled and set to “All Notifications.” On Android 13+, apps require explicit notification permission which may have been denied during installation. Toggle notifications off and on to reset the permission state if needed.
2. Disable Battery Optimization for the App
Go to Settings → Battery → Battery Optimization (or “App Battery Usage”) → find the app → set to “Don’t Optimize” or “Unrestricted.” Battery optimization aggressively kills background processes on many Android phones (especially Samsung, Xiaomi, Huawei) which prevents apps from receiving and displaying notifications.
3. Check Do Not Disturb Settings
Go to Settings → Notifications → Do Not Disturb. If DND is on, either disable it or add the problematic app to the exceptions list. You can also set DND schedules so it doesn’t activate during hours when you need notifications. Many users accidentally leave DND on after a meeting and forget to turn it off.
4. Enable Background App Refresh (iOS)
On iPhone: go to Settings → General → Background App Refresh → enable for the problematic app. Without background refresh, iOS apps can’t check for new notifications when you’re not actively using them. Enable it specifically for messaging and news apps that need real-time notifications.
5. Clear App Cache and Check In-App Settings
Some apps have their own notification settings inside the app itself. Check the app’s settings menu for notification preferences and ensure alerts are enabled at the app level too. Also check notification channels in Android settings (Settings → Apps → app → Notifications) where individual notification types can be turned off independently.
Frequently Asked Questions
Why do I only get notifications when I open the app?
This is a classic sign that battery optimization is killing the app’s background process. The app can only receive notifications when it’s actively running in the foreground. Disable battery optimization for that specific app as described in step 2 above. On some phones (especially Chinese brands), you also need to allow autostart for the app.
Why are my notifications delayed by hours?
Delayed notifications are caused by aggressive battery optimization preventing background push delivery. The delay corresponds to when you next open the app and it syncs. Fix: disable battery optimization, enable autostart (if available), and keep the app in your recent apps list to prevent the system from killing it completely.
Do I need to reinstall an app to fix notifications?
Reinstalling is rarely necessary for notification issues. The problem is almost always in system-level settings (permissions, battery optimization, DND) rather than the app itself. Work through the five steps above first. Reinstalling is only worth trying if the app’s notification settings show errors or the app itself is crashing.
