[Valkhyr]

Primary: File management. I tend to prefer the command line for that kind of thing. Includes occasionally rsync-ing or scp-ing stuff to and from servers, and modding a few games I have on Android (Beamdog's Enhanced Edition mobile ports of old CRPGs).

Secondary: Study programming - I am a self-taught programmer, and before the pandemic I would study a lot on public transit, in coffee shops, while waiting for people etc. This actually used to be the primary use case before I started working as a professional programmer and was also using breaks to study. Android/Termux is not really suitable for actual dev work (e.g. you'll probably need Docker at some point if you're doing backend, and you'll want a browser with dev tools for frontend), but for limited study projects (especially backend dev) it's absolutely awesome.

It's also my SSH client to access a few servers I keep privately, but this is a feature that certain dedicated apps (e.g. JuiceSSH) could do equally well or better, and I'm just using Termux because I already have it.