title: iOS: Can I get the pitch/yaw/roll from accelerometer data?
body: <p>I want to find out the pitch, yaw, and roll on an iPad 1. Since there is no deviceMotion facility, can I get this data from the accelerometer? I assume that I can use the vector that it returns to compare against a reference vector i.e. gravity.</p>
  
  <p>Does iOS detect when the device is still and then take that as the gravity vector? Or do I have to do that?
  Thanks.</p>