Hi there! I understand you're having trouble with the Hanna app on your phone — it wasn't working, so you deleted it but now you can't reinstall it. Let's see if we can get this sorted out together.

To help narrow things down, can you tell me:
- Are you trying to reinstall the app from the Google Play Store?
- Do you get any error messages when trying to install it, or does the install just not start?
- Have you tried restarting your phone since uninstalling the app?

Meanwhile, here are some steps that often help with app reinstall issues on Android 10 devices:

1. Restart your phone: Hold down the power button and select restart to refresh system processes. This sometimes clears minor glitches.

2. Clear cache and data for Google Play Store:
- Go to Settings > Apps & notifications > See all apps
- Find and tap Google Play Store
- Tap Storage & cache
- Tap Clear cache and then Clear storage/data
- Try reinstalling the Hanna app afterwards.

3. Check app permissions:
- Go to Settings > Apps & notifications > Hanna app (if it still appears)
- Tap Permissions and make sure the necessary ones like Storage and Network are allowed.

4. Free up storage: Make sure your device has enough free space to install the app.

5. Check for system updates: Sometimes installing the latest Android updates can help with app compatibility.

If after this the app still won’t install and you get an error message, let me know what it says exactly. Some users have also noted issues could be related to Hanna's servers or bugs, so if nothing works, it might require checking if Hanna is currently experiencing problems.

Let me know how these steps go or if you see any specific errors. I’m here to help! Are you able to try these now?