BlueDuino is an app for AprilBrothers microcontroller development board which also names BlueDuino.You can control the board with two ways, simple and firmata. Download the sketch from github and burn the sketch to the board. Burn the sketch which you want to use to the board. If you burn the wrong sketch, you can get the message you want when you connect to the board.Turn on the bluetooth on you phone when you use the app or you cant find the board. To control the board you should connect to the board. when the board is connected with you phone, you can set the mode of pin, and you also can read or write value to pin.