I used mine to monitor stats on my gaming PC with an app called Remote Systems Monitor. I think you have to pay a one time fee to unlock everything, but it was well worth it imo. The application on your PC sends the data to the app over your network locally.

I paired it with Automate app, so when my PC turned off the power to USB got cut, the phone would lock and dim the brightness down to 0 - just so I'm not frying the battery. Then it would do the opposite when I turned my PC back on, was a pretty fun little project to do.