Hi! I see your G28 watch's sleep monitor isn't working with the JYouPro app. Let's get that sorted out.

To start, could you tell me a bit more? Is the sleep monitor not recording any data at all, or is it only showing partial sleep info? Also, have you noticed if the watch or app is syncing properly, or if other tracking features like heart rate or steps are working fine?

Meanwhile, here are some common fixes for the sleep monitor issue on the G28 with the JYouPro app:

1. Update Firmware and App
Make sure your G28 watch firmware is up-to-date through the JYouPro app. You can usually check for watch firmware updates inside the app settings or device menu. Also, ensure the JYouPro app on your Android 10 device is the latest version from Google Play.

2. Check App Permissions
Since the app needs to track sleep data, confirm it has the necessary permissions, like access to sensors and background data. On your Android device, go to Settings > Apps > JYouPro > Permissions, and enable all needed permissions.

3. Re-sync the Watch and App
Unpair and then pair your G28 watch with the JYouPro app again. Sometimes a fresh connection solves syncing issues which affect sleep data transfer.

4. Reinstall the JYouPro App
If syncing and permissions look good but sleep monitor still isn’t working, uninstall the app and reinstall it from Google Play to clear possible corrupted files 9.

5. Sleep Tracking Limitations
Some users have reported that the sleep tracking only records sleep starting after a certain time (like 10pm or midnight). Confirm if your sleep hours match the watch’s tracking window. Unfortunately, this setting may not be adjustable.

If you've already tried any of these or are noticing specific behaviors, let me know, and we can dive deeper! How does this sound so far?