Gyroscope Sensor Useage -> A simple, uncalibrated estimation of the devices orientation.
Complementary Gyroscope Sensor Useage -> A calibrated, sensor fusion backed estimation of the devices orientation. Uses a complementary filter in conjunction with the acceleration, magnetic and gyroscope sensors.
Kalman Gyroscope Sensor Useage -> A calibrated, sensor fusion backed estimation of the devices orientation. Uses a Kalman filter in conjunction with the acceleration, magnetic and gyroscope sensors.