I'm an enthusiastic enjoyer of the Janet programming language.[0] Sometimes people ask questions about how to do something in the Janet Zulip instance, and I like to help if I know the answer. But I'm most likely to see those messages first on my phone.
Termux makes it super easy to pull up a Janet REPL on my phone and try some things out before I reply. You could do the same with node or Python or anything else with a CLI REPL.
[0] https://janet-lang.org