Yes, I do in fact use Orgzly. For a very specific subset of notes it's fine. But for a long bit of documentation, no good editor exists on anything but a desktop / laptop. That is, nobody's reimplemented enough of Emacs on Android yet.
"Long bit of documentation"? Isn't it the device that's not suited? I sure wouldn't want to do a lot of typing on a handheld device. Emacs shortcuts should be fun.
Don't get me wrong, I love org mode, but there is no real support on Android other that a damn-fine list-making app that uses a subset of org-mode format for its lists.
For typing, Termux's "extra keys row" makes ctrl and meta combinations possible with your favorite keyboard: https://wiki.termux.com/wiki/Touch_Keyboard
...or you can just use Hacker's Keyboard (but I find it too cramped).
Git also runs fine under termux if that's what you use to sync your org file.