I'm not going to be critical of either MobileOrg or Orgzly, which are the way to go if you want a dedicated app. But I much prefer going to the trouble of setting up a Termux environment, which allows Emacs to run in a very close to native term mode on any Android device.
I combine this with an rsync service and I have my working environment on two Linux desktops, three Linux laptops and three Android devices, including my phone. -- Bob Newell Honolulu, Hawai`i Via Linux/Emacs/Gnus/BBDB.
