On Android devices, you can use Termux (Debian style Linux as an app) and install a complete emacs inside. I use it on a tablet and sync files (incl. *.org) ove

On Android devices, you can use Termux (Debian style Linux as an app) and install a complete emacs inside. I use it on a tablet and sync files (incl. *.org) over ssh with my "real" computers. The tablet can be used with a bluetooth keyboard if I have to do a lot of typing and have no laptop with me. And thanks to ssh I can reach any of my computers, even ones at home via reverse ssh tunneling.