Boomer uses a complicated algorithm based primarily on the position, speed, and type of shot hit (groundstroke, volley, overhead or serve). It also considers how quickly the ball came back after being thrown by Boomer and the 2nd bounce depth. If you hit the ball “in” the singles court or “in” the correct service box it will rate the ball on a scale from 1.0 to 7.0. If you hit the ball “out” it will get a rating of 0.0.
