It would also be far less secure. This goal is incompatible with your other goal of wanting to use Android. Orbot is not as well tested as the desktop browser bundle and even the SR admins recommend not using it. Don't use it. I don't know what PGP programs are available for Android, but judging from all the shitty Windows, Mac, Java programs out there, and the generally lower quality of mobile apps, I wouldn't trust any PGP program for Android. Don't cut corners. Use a desktop or laptop computer with the standard browser bundle and GPG for Linux, GPG4USB for Windows, or GPGTools for Mac.