I tried this Emacs for org-mode. It was not that good experience. Very recently I found orgzly[0]. It might be interesting for you too.

[0] https://github.com/orgzly/orgzly-android

I use it more for programming quick scripts and handling source code that people happen to send me over Telegram -- it even integrates well as a system editor. I'll take a look at orgzly, thanks.

Oh no way, orgzly is open source? I've been using it extensively but have been very frustrated with the fact that it doesn't sync automatically. Time to git clone...

Or if you'd rather not fork, check out this write up of an approach to getting Orgzly to sync via termux and Tasker: https://2li.ch/home/syncing-org-files