My portable Org mode setup is read-only, and I'm very happy with it. I just copy the files from my desktop to ~/Documents/Notes on the Android device an us Orgr

My portable Org mode setup is read-only, and I'm very happy with it. I just copy the files from my desktop to ~/Documents/Notes on the Android device an us Orgro (Orgzly or Organice) to read them. If I do need to record something on the go I make a voice note and update the Org mode file at home on the desktop. I then push to the phone with adb, or pull from the phone with scp in Termux.