Why do people hate (or love) playing golf on World Golf Tour? NO RULER. Imagine driving a car without any gauge, or reading a book without page numbers.
Every time we try to hit the ball, our instinct tell us it's a simple math, distance divided by club. Why not include a calculator to eliminate guessing? So we could spend more time to focus on the "ding".
That was how Swingmate born. Simple idea, but it end up improve our overall games, A LOT.