Hi! I understand you're having trouble with adding buys (purchases) on the tricount app—they seem to let you add them but then they don’t get saved, right? To help you better, may I ask:

- Are you using the tricount app or the website on your Android 10 device?
- When you add a buy, do you see any confirmation or error messages?
- Have you tried closing and reopening the app or refreshing the page after adding a buy?
- Are you logged into your tricount account properly when this happens?
- Does this happen with all tricounts or just one specific group?

While I wait for your answers, here are some quick steps you can try that often fix issues related to saving expenses:

1. Check your internet connection: Sometimes if the device is offline or has poor connection, changes might not be saved properly.
2. Log out and log back in: This refreshes your session and can solve syncing problems.
3. Clear app cache: On Android 10, go to Settings > Apps > tricount > Storage > Clear Cache. Then restart the app and try again.
4. Update the app: Make sure you have the latest version from Google Play Store, as older versions might have bugs.
5. Try a different device or browser: If you can, check if adding buys works on another device or via the tricount website.

If you’ve already done these or the problem persists, there might be a more specific issue with your account or the tricount you are editing. I can help look into that further. Let me know if you want me to guide you through more detailed checks or if you notice any patterns.

Are you comfortable trying these steps?