Setting Up Warning Apps Correctly: Step-by-Step for Android and iOS

Why Default Settings Are Not Enough

Installing NINA and assuming you are done? Unfortunately not. The 2020 Warntag demonstrated that many people did not receive warnings — not because the app was missing, but because push notifications were incorrectly configured or battery saving modes were blocking the app.

This step-by-step guide ensures you will actually be warned when it matters.

Setting Up NINA on Android

Step 1: Install NINA

1. Open Google Play Store
2. Search "NINA" or "Warn-App Bund"
3. Install (developer: Bundesamt für Bevölkerungsschutz — verify this before installing)
4. Open the app

Step 2: Configure Locations

1. Tap "Mein Ort" (My Location) on the main screen
2. "Ort hinzufügen" (Add location) → enter your home address (postcode or city name)
3. Add a second location if needed (workplace, frequently visited family)
4. Optional: Activate GPS-based location for warnings wherever you currently are

Important: Enter ALL relevant locations manually. NINA only sends warnings for explicitly registered locations — it does not automatically warn you about your current GPS position unless you enable this separately.

Step 3: Activate Notifications

1. Open NINA → Settings (gear icon)
2. "Benachrichtigungen" (Notifications)
3. Activate all categories:
   • Bevölkerungsschutz (Civil protection)
   • Feuerwehr- und Katastrophenschutz (Fire and disaster protection)
   • Wetterwarnungen DWD (Weather warnings)
   • Hochwasserwarnungen (Flood warnings)
   • Gefahrenmeldungen (Hazard notifications)

Step 4: Check Android System Settings

Android has its own battery optimization and notification management that can override app settings:

Notification priority:

1. Settings → Notifications → find NINA in the app list
2. Enable all notification channels
3. Set notification priority to "High" or "Urgent"

Battery optimization (the most common reason warnings are missed):

1. Settings → Battery → Battery Optimization
2. Find NINA in the list
3. Select "Don't optimize" or "Unrestricted"

Manufacturer-specific settings:

• Samsung: Settings → Battery → Background app usage → NINA → "Never sleeping"
• Xiaomi/MIUI: Settings → Apps → NINA → Battery → No restrictions
• Huawei/EMUI: Settings → Battery → App launch → NINA → Manage manually, enable all three toggles

Step 5: Verify NINA Can Run in Background

Some Android versions restrict apps from running in the background:

Settings → Apps → NINA → check that "Background activity" is allowed

Setting Up NINA on iPhone/iOS

Step 1: Install NINA

1. Open App Store
2. Search "NINA" or "Warn-App Bund"
3. Install (verify the developer name)
4. Open the app

Step 2: Configure Locations

Identical to Android — add your home location and any additional relevant locations from the main screen.

Step 3: iOS Notification Settings

1. iOS Settings → Notifications → NINA
2. Allow Notifications → On
3. Lock Screen: On
4. Banner style: Persistent (not Temporary — temporary banners disappear quickly)
5. Sounds: On
6. Badges: On

Step 4: Activate Cell Broadcast on iPhone

From iOS 16.1, iPhones can receive Cell Broadcast emergency alerts:

1. Settings → Notifications
2. Scroll to the very bottom
3. Government Alerts (Behördliche Warnmeldungen) → activate all options

Setting Up BIWAPP (Android & iOS)

BIWAPP setup is similar to NINA:

1. Install from the relevant app store
2. Select your region (often auto-detected by GPS)
3. Settings → Categories → activate all relevant categories
4. Activate push notifications using the same method as NINA (battery optimization exclusion is equally important)

Regional tip: If you are in Baden-Württemberg, Bavaria, or Hesse, BIWAPP has particularly strong municipal integration. Worth installing alongside NINA.

Testing Your Configuration

After setup, verify everything is working:

Method 1: Check NINA Test Notification

NINA settings may include a "Testwarnung" (test warning) option. Not all versions have this — check your settings.

Method 2: Annual Warntag

Germany's annual Warntag (second Thursday of September, 11:00 AM) sends real warnings across all channels. This is the best test of your complete setup.

Mark it in your calendar. On that day, verify that you receive the warning via NINA, BIWAPP, and Cell Broadcast.

Method 3: Check Historical Warnings in Your Area

NINA shows a map of recent warnings. If any warnings have been issued in your area since you installed the app, verify you received them as push notifications.

Troubleshooting: Common Problems and Solutions

Problem	Likely Cause	Solution
No warnings at all	Battery optimization blocking NINA	Exclude NINA from battery optimization
Warnings arrive late	Background restriction	Enable background activity in app settings
No notification sound	Phone in Do Not Disturb or silent	Set NINA to override DND; check notification sound
App crashes frequently	Old Android version	Update Android if possible; check for NINA updates
Cell Broadcast not received	Incompatible device or iOS < 16.1	Update iOS; check device Cell Broadcast compatibility
Warning received but no banner	Notification priority too low	Set NINA notifications to "High/Urgent" priority

Advanced: Government-Level Cell Broadcast Verification

Cell Broadcast can be tested in Android developer options (for technically experienced users). However, the annual Warntag is the more accessible test for most people.

For iPhone: Settings → Notifications → bottom of the page confirms whether Government Alerts are enabled.

Additional Recommendation: Battery Radio as the Final Fallback

No warning app replaces a functioning battery-powered radio.

When electricity fails, your phone battery dies, and cellular networks are overloaded — a hand-crank or battery-powered DAB+/FM radio still receives ARD and ZDF emergency broadcasts.

A decent battery radio costs 25-50 euros. It is the genuine last-resort warning layer.

Conclusion

Warning app setup in Germany takes 10-15 minutes to do correctly — but most people skip the critical steps (battery optimization exclusion, notification priority). The result: you have the app, but it does not work when you need it.

Follow the steps above. Test on the next Warntag. Add BIWAPP for redundancy. And have a battery radio for when digital channels fail. This four-layer approach (NINA + BIWAPP + Cell Broadcast + radio) provides the most robust warning coverage available to German residents.