Golf Sense can detect the acceleration, velocity, tempo, position & posture of the device & the club by calculating sensor data at sample rates over 1, 000 times per second. At the same time, the high velocity motion engine inside the software will divide the swing into different segments of club position & posture. The result is a highly accurate view of your swing down to the millisecond. When it comes to calculating club head speed, Golf Sense is within 3 mph of doppler radar systems such as Track Man & laser systems such as Golf Achiever. The Golf Sense App is available for iPhone, iPod, iPad & Android mobile devices.