Hi there! I'm Pierre, and I'm here to help you with the issue you're experiencing with the Quran 13 Line Qamr app. Could you provide a bit more detail on what's not working? Are you seeing an error message, a blank screen, or something else? This will help me guide you better to a solution.

Blank screen

Thank you for the details! A blank screen can be quite an issue. Let's try a few steps to see if we can resolve it.

1. Clear App Cache and Data:
- Go to your device's Settings.
- Tap on Apps or Application Manager.
- Find and select Qamr app from the list of installed apps.
- Tap on Storage.
- First, try tapping on Clear Cache. If that doesn’t work, tap on Clear Data. Please note that clearing data may remove any saved settings.

2. Check for App Updates:
- Open the Google Play Store app.
- Tap on the Menu icon (three horizontal lines).
- Tap on My apps & games and look for updates available for the Qamr app. If there's an update, install it.

3. Reboot Your Device:
- Sometimes, simply restarting your device might resolve temporary glitches.

4. Reinstall the App:
- If the above steps don't fix the issue, uninstall the app and then reinstall it from the Google Play Store. This can often resolve persistent issues.

Let me know how these steps work out for you, and if the blank screen persists, we can explore further options together!