Hi there! I understand your Libre app randomly stops working, mostly at night. Just to clarify, when you say it "stops working," does the app crash entirely, freeze, or lose connection to the sensor? Also, are you using it on your Windows device or another device like a phone to scan the sensor?

Knowing this will help me guide you better. Meanwhile, here are some common steps that often resolve Libre app crashes, especially those that happen during extended idle times at night:

1. Check Battery and Background Activity Settings
Since crashes happen mostly at night, it might be related to the app getting restricted from running in the background to save battery. On Windows, check if any power saver mode or antivirus settings are limiting the Libre app's network or background activity and disable such restrictions for it.

2. Update App and Operating System
Ensure your Libre app is updated to the latest version compatible with Windows 10. Also, run Windows Update to install any pending system updates which can improve app stability.

3. Clear App Cache and Temporary Files
Sometimes leftover cache or corrupted temporary data can cause crashes. If Libre app settings allow, clear cache or temporary data. If not, you might consider reinstalling the app entirely.

4. Check for Interference or Network Issues
If the app communicates with the sensor wirelessly, confirm that there are no Bluetooth or NFC issues, and that your device’s wireless adapters drivers are up to date. Also, try toggling airplane mode on and off, or restarting the device.

5. Review App Permissions
Double-check that the Libre app has all the needed permissions enabled on your device, including access to network, sensors, and notifications.

If you’ve already tried any of these, please let me know which ones. Also, share any error messages or behaviors observed when the app stops. With that info, I can dig deeper or guide you through advanced troubleshooting.

Are you ready to start with these checks, or do you want me to walk you through specific steps for your Windows 10 environment?

Its on my phone and just started stopping in the last 3 days before that was working fine. The message just says "App has stopped working".

Thanks for the details! Since your Libre app on your phone started stopping with the message "App has stopped working" recently, and it was fine before, this often points to either a recent app issue, a software conflict, or a glitch. Let's tackle this step-by-step:

1. Restart Your Phone
This simple step refreshes your phone’s memory and can resolve temporary app errors.

2. Update the Libre App
Developers sometimes release patches to fix crashing issues. Go to Google Play Store → your avatar → Manage apps and device → Updates, and update the Libre app if an update is available. Notably, there was a recent patch that fixed similar crashing issues for Libre 3 users1.

3. Clear Cache and Data of the App
Sometimes corrupted data causes crashes. You can clear cache and data by going to Settings → Apps → Libre app → Storage → Clear Cache and then Clear Data. Note: Clearing data may require you to log back in or re-pair your sensor.

4. Check App Permissions
Ensure Libre app has all necessary permissions, especially for NFC and background activity, by reviewing Settings → Apps → Libre → Permissions.

5. Check Battery Optimization Settings
On some Android phones, battery optimization can restrict the app in the background, causing instability. Go to Settings → Battery → Battery Optimization, find the Libre app, and set it to "Not optimized" or “Unrestricted” to allow it to run freely3.

6. Reinstall the App
If the above steps don’t help, uninstalling and reinstalling the Libre app may resolve deeper app corruption. Just keep in mind that reinstalling could require reconfirming or resetting your sensor pairing7.

Let me know which of these you’d like help with or if you’ve already tried some. I’m here to walk you through any steps!