GmSpeedPlus 與 landMeter Car 使用情況與統計

LandMeter indicates a graphically pitching and rolling of your car meanwhile driving, just put your iPhone on a car holder with a default angle, and keep driving, LandMeter show you the slope and tilt to have safe driving in off-roads. meanwhile the angles became more than the 45 degrees a red light shown to indicate the danger driving state. calibrate button set the tilt and slope according to your car holder.