The swing tempo app helps you perform a more consistent swing. The device measures and displays your backswing time and downswing time. The device also displays your swing tempo. Swing tempo is the backswing time divided by the downswing time, expressed in a ratio. A 3 to 1 ratio, or 3.0, is the ideal swing tempo based on studies of professional golfers.
So if a person swings with a faster tempo, the number will be lower. So, 2.4 essentially means your swing is faster than someone that has a 3.4.