Yup, the sample code even has a simple filter for this: http://developer.apple.com/library/ios/documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/Mot

Yup, the sample code even has a simple filter for this: http://developer.apple.com/library/ios/documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/MotionEvents/MotionEvents.html#//apple_ref/doc/uid/TP40009541-CH4-SW11 http://developer.apple.com/library/ios/documentation/EventHa... The accelerometer + gyroscope combination is refered to as "sensor fusion algorithms" in that document, btw