I can second this, Termux + Emacs turned my phone back into a personal computer.
It is helpful to add extra keys to your touch keyboard, which you can do by editing your termux properties file (see https://wiki.termux.com/wiki/Touch_Keyboard). Helpful when you don't have a hardware keyboard available.
It is helpful to add extra keys to your touch keyboard, which you can do by editing your termux properties file (see https://wiki.termux.com/wiki/Touch_Keyboard). Helpful when you don't have a hardware keyboard available.