Description
> Measure the speed of a friend, pupil or opponent's serve > Simply tap once when your opponent hits the ball and again when it lands > Then move the character and ball to match the positions in real
> Measure the speed of a friend, pupil or opponent's serve > Simply tap once when your opponent hits the ball and again when it lands > Then move the character and ball to match the positions in real life > Press calculate speed, and then you find out how hard the ball was hit!
