This app accompanies the book Unlocking Android (http://manning.com/ableson2). It uses Bluetooth and Orientation Sensor. Tilt the phone to drive the robot. No programming required on the Lego Mindstorm NXT robot.Robot MUST be named NXTMust have Android 2.0+. Tested on Nexus One & Moto. Droid.http://msiservices.com