Android: BT Controller links Android devices together so one Android device can serve as the gamepad for another Android device.
Whether that means you use your Android phone as a controller for video game emulators on your Android tablet or you use an old Android phone to control the action on your new and more spacious Android phone, you can easily link together two devices. Check out the video above to see the installation process and the controller in action (jump to 3:26 if you just want to see them using the controller).
BT Controller is available as both a free ad-supported version and an ad-free version ($0.99). Hit up the link below to read more and check out which Android-based game emulators are supported.