Hi there! Thanks for reaching out about Pro Metronome shutting down after a few minutes. To better assist you, could you tell me if the app closes entirely, or if it just stops producing sound but stays open? Also, are you using any other apps simultaneously, or is Pro Metronome running in the background for a long time?

Meanwhile, as a starting point, here are some steps you can try on your Android 10 device with the WebKit browser:

1. Restart the App: Close Pro Metronome completely (make sure it's not running in the background) and reopen it.

2. Clear Cache and Data:
- Go to Settings > Apps > Pro Metronome
- Tap on Storage
- Clear cache first, then clear data (note clearing data may erase saved preferences or settings)
- Restart the app and check if the issue persists.

3. Check Battery Optimization Settings:
Sometimes Android's battery saver or optimization may kill apps running longer or in the background.
- Go to Settings > Battery > Battery optimization
- Find Pro Metronome and set it to "Not optimized" or allow it to run unrestricted.

4. Update or Reinstall the App:
Make sure you're running the latest version of Pro Metronome from the Play Store. If yes, try uninstalling and reinstalling.

5. Close Other Apps:
If you have many apps running, especially those that use audio or CPU heavily, try closing them to see if performance improves.

If these don’t resolve the issue, a known cause in some cases is background activity getting restricted by Android, leading the metronome to stop after some time. Let me know what you find with these steps, and we can explore deeper settings or logs if needed.

Are you able to try these and tell me how it goes?