Tennis Line Call App

Turning your iPhone into an AI line umpire device for everyone to make their own Hawk-Eye like challenge. The tennis app to challenge line calls with reliable results. High frame rate, super simple, quick to setup.
The app also includes a free serve radar mode that is a ton of fun to use with friends, students or your own to measure your tennis serve speed without the need for radar or tracking gun.

Adopt the easy routine every amateur tennis player is striving for and play a fair tennis game:

1. Start the tennis app.
2. (optional) Sync up with your opponent by scanning QR code.
3. Setup your phone on a tripod facing your side of the court.
4. When there is a questionable line call, you have 10 seconds to trigger a line challenge by raising your right arm up for 3 seconds (beta), or using your Apple Watch. Your phone will show a steady flash for IN, a blinking flash for OUT, and the result will be audible. If you use an Apple Watch, you can see the results and picture there, too.

The Tennis Line Call App is the end of disagreements, cheating or self doubt about line calls when playing a tennis match.
You can also use the serve speed and In or Out analytics results to improve your game.

Works best with iPhone 11 and above.