This would just be a way for you to see what qbittorent is doing from your phone. In qbit you’d turn on a few settings and then point this app to what you just turned on, and then see what’s downloading from your phone.

The app isn’t doing anything beyond taking interpreting what your other programs (e.g., qbit, sonarr, radarr, etc) are doing while you’re away. Depending on the program you could also tell it to download something, but that’s all still happening on your laptop. Your phone is just the middle man.

What do you mean? The nzb360 app is just a front end for services you have running on a server somewhere. Are you asking how to run the backend part discreetly?