GmSpeedPlus 对比 landMeter Car 的使用情况和统计数据

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.