Answer
The Embedded MotionApps Platform provides MotionFusion of three axis gyroscope and three axis accelerometer data. The result is an angular frame which is relative to gravity (down). On its own, a three axis accelerometer can be used to find an angular frame relative to gravity. However, because accelerometers detect the sum of linear acceleration and gravity, an accelerometer cannot provide an accurate angular frame solution when it is in motion, which makes it unusable in many applications. By fusing the gyroscope with accelerometer, Embedded MotionApps delivers a stable angular frame solution which precisely follows the device motion.