To fix an app that isn't responding, you can try: restarting your device, clearing the app cache and data , force stopping the app, checking your internet connection, updating the app, and if necessary, uninstalling and reinstalling the app;.
Here are a few more detailed steps to troubleshoot an unresponsive app:
Basic steps:
Restart your device: This often clears temporary glitches and can resolve many issues.

Check your internet connection: Ensure you have a stable internet connection, especially if the app requires online access.

Update the app: Check for app updates in your app store and install them.

App-specific actions:
Clear app cache and data: Go to your device settings, find the problematic app, and clear its cache and data.

Force stop the app: In your device settings, find the app and select "Force Stop" to completely close it.

Advanced troubleshooting:
Check for system updates: Make sure your device is running the latest operating system version.

Check storage space: Ensure you have enough storage available on your device.

Scan for malware: Run a virus scan to check for potential malware interfering with your apps.
Uninstall and reinstall the app: If other methods fail, try uninstalling the app and then reinstalling it from the app store.