[thetemp_]

Orgzly and Orgro can edit Org files on Android. (Orgro, also on iOS, along with other options.)

Both apps support Org-mode's scheduling, robust linking, and search features to some extent, features which don't exist at all in Markdown.

[Groxx]

I did try Orgzly a bit (it's decent though a bit unique, definitely worth a try for anyone curious), but I ended up dropping it after finding out that what I had made in it wasn't compatible with some other thing (I think Emacs, but it has been a while). Possibly something covered in https://www.reddit.com/r/orgmode/comments/9q9mn6/any_documen... though that's more about the reverse direction.

But that kind of inconsistency has been my overwhelming experience with anything except Emacs. CommonMark stuff has been practically flawless every time by comparison (though "markdown" in general is absolutely not, that's an unspecified mess)