Puzzak's ToolKit let's you monitor your server from your phone.
You can observe the following:
- Ping to your Android device
- SoC temperature
- SoC utilisation
- RAM utilisation
- Incoming and Outgoing network transfer rate

* App displays data for the test server, you can change server URL in settings after you set up monitoring script on your server.
* Monitoring script is open-source, you can check what is it doing and remove unnecessary functions (but it may cause issues with the app)
* This app is very early in development, so it may not be stable or work at all. You can try it now and your feedback will be very useful.
* Check out the script here:
https://github.com/Puzzak/AIO-Monitor/blob/main/AIO.php