On Android you can use a lot of programming languages inside Termux[0]. It is a terminal environment with a package manager. I'm mostly using it for writing small automation bash scripts and a little for Nim programming.
What surprised me is the fact that Termux always ships the latest version of Nim. They're practically the first to update the compiler on new version release, even compared to rolling Linux distros, OpenSUSE Tumbleweed and Arch taking second and third place after a week or two.
I also have full blown Neovim IDE configured for Nim. In combination with a custom 7-row keyboard[1] it's even somewhat comfortable to use for a quarter of an hour =).
[0] - https://termux.dev/en/