I have some motion sensor samples that were recorded with an Iphone. Now I'm into calculating a distance between a user gesture and the gesture that was recorded on the Iphone.
My problem is that the sensor data on the Iphone is represented in a different way then the android sensor data. If i don't move the Iphone I get data between -1 and 1 if I don't move my Android device I get values around 9 because the sensor measures the force of gravity.
I couldn't figure out how to convert the Iphone sensor reading to compare them to my android sensor readings. The android motion sensor data is explained here. And the Iphone documentation contains this pdf.