On iOS (Apple):

1. Go to Settings
2. Tap App Store
3. Turn on or turn off App Updates

On Android:

1. Open the Google Play Store app .
2. Tap Menu Settings
3. Tap Auto-update apps
4. Select an option:
   • Over any network to update apps using either Wi-Fi or mobile data.
   • Over Wi-Fi only to update apps only when connected to Wi-Fi.

Note: If an account on your device has a sign-in error, apps may not update automatically.