How it works
Set up a tripod
Setting up iChallenge is simple. But in order to properly detect if the ball was in or out, iChallenge needs a stable view of the court at a specific angle. The best way to achieve this is to mount your phone on a tripod.See how to set up a tripod
Delineate the tennis court
First, specify if your mobile is on the left or right side of the court and wait for its calibration. The virtual tennis court will perfectly overlap with the actual court. This way your virtual umpire can make the right calls.
Select the game mode
iChallenge works both for singles and doubles - just make sure you choose the mode corresponding to your match format.
You said it was out? Challenge!
If you have any doubts whether the ball was really in or out, don't waste time arguing with your partner and let iChallenge have the final say! The app tracks the ball’s trajectory and indicates its point of contact with the court surface, deciding whether it was in or out.