Yes let, stroke, no let, warnings and conduct. Each call is logged the moment you make it, right next to the score it changed. No arguing afterwards about what was said.
Game scores, points per game and the time each game took. Warm-up and rest timers are built in, and every player gets their own colour so you never mix them up.
Full game scores and the complete rally history stay on your device. Open any old match and see exactly how it went, point by point.
Follow the device, or fix it upright or sideways. Turn it landscape and you get a scoreboard you can read from the court, with calls for both players within reach.
Big numbers, both players' calls at the edges, rally history in the middle.
Match type, point system, points per game and tiebreak rules. Set the warm-up time and the rest between games once, and the timers take care of the rest.
The same app, laid out for the bigger screen. Put an iPad on the referee's table and everyone can follow along.