Erlang (and Elixir and so on) run fine under Termux. Just slap on Phoenix or something and have your GUI in the phone browser if that's your thing. People that

Erlang (and Elixir and so on) run fine under Termux. Just slap on Phoenix or something and have your GUI in the phone browser if that's your thing. People that have succumbed to Apple tell me they have facilities at least as good as Termux so you can probably do something similar there.