John GBA is GBA emulator for android 4.1+. This app does not work without your own game files.

John GBA has good compatibility, smooth game play , and quality audio
Supports load/save states, cheats, external controllers, screenshots, speed increase, and dropbox.
This version has Ads. Ads appear as pop-ups while in menu and small banners at the top of the screen while in game play.
All and all a very nice emulator.

This app has been deprecated. John GBAC can be found here.