John GBAC of the successor app have been released.
https://play.google.com/store/apps/details?id=com.johnemulators.johngbac

John GBC is GB/GBC emulator for android 4.1+.
This app does not work without your own game files.
Please try John GBC lite before purchasing.
John GBC can take over John GBC Lite data.

Features
- Original GBC engine
- High quality rendering
- Very fast
- Search game files in SDCard & Internal Storage
- Virtual On-screen keypad
- Zipped file support
- Save States (with previews)
- Customizable keys
- Turbo buttons
- Screenshot
- Fast forward / Slow down (x0.25 - x16)
- Cheats (Game Genie/Game Shark/PAR)
- Bluetooth/MOGA controller support
- Super Gameboy borders
- Dropbox support (requires John DataSync)
- No ADs
- No internet connection