iSwingSpeed 1.0 for iOS – Calculates Speed of Golf Swing in MPH or KPH

Marvel Apps today is pleased to introduce iSwingSpeed 1.0 for iOS, their new sports app that calculates the speed of the user’s golf swing in either miles per hour or kilometers per hour. To operate, the user places their iPhone flat on the ground, approximately 27 inches behind the ball in the swing path of the club (the iPhone is 4.5 inches long, so six phone lengths works perfectly). Employing the iPhone’s built-in mic, the app measures the speed of the swing to an accuracy of plus or minus 4 MPH at speeds up to 140 MPH. The user need not pre-set the app; speed is displayed automatically following every swing. The scientific literature on the physics of golf balls, golf swings, and golf clubs is surprisingly rich, and dozens of physical factors and variables may come in to play. Interestingly, the golf ball once hit, travels faster than the maximum speed of the club due to elasticity effects. “We at Marvel Apps, exhaustively tested the algorithm for 6 months with various clubs, balls, placements of the iPhone, and radar guns. An accuracy of +/-4MPH was achieved for our swings at the GolfSmith driving dome, comparing iSwingSpeed readings to GolfSmith readings. Above 140MPH we observed +/-6MPH. We are working feverishly to improve the accuracy.”