This android app makes you control your EV3 or NXT controller. No need to Program, just open the Bluetooth of controller and connect.*GAMEPAD MODE (can pick from normal button or joystick):-4 Normal arrow button-Analog joytick button-Adjust Speed-IP Camera Viewer-Buttons can be Hold and release.4 Motor Port can be use. PORT A and B are use for Arrow, Joystick controlPORT C and D are use for circle, square, eks, triangle.