Tennis Serve Tracker

★★★★★ You can use your camera to capture the court's dimensions, and it can accurately calculate your speed. Pretty cool.

★★★★★ Looks good and the court recognition is very impressive. Although the free version doesn't really allow you to measure the speed unless you buy the full version. I think you guys use the wrong marketing strategy, I would expect to be able to measure the speed for at least 2–3 videos before I am forced to buy the premium upgrade. Anyway I bought the upgrade and calculation works good, at least it gives same level of speed value as other apps, but I believe that due to the court recognition, this app can give much more accurate results. One more thing that I didn't like is the UI to choose the ball hit and bounce spots. I had spent around 10 minutes trying to figure out how to mark these spots before I realized that instead of tapping the appropriate buttons at the bottom right, I need to drag them to the point on the video (also once dragged, make sure it has left the red mark which happens not always and in this case you need to try placing it one more time). And two requests: 1) it would be great if it worked with external videos (so I could try it on some of my old videos or with pro players videos); 2) be able to re-calculate speed for existing videos.

★★☆☆☆ The app doesn't do serve speed calculations before upgrading to premium. In order to upgrade it asks me to enter my email password, which doesn't look right. Why wouldn't they allow to simply buy a premium version at Google Play Store? Uninstalling for good...

★★☆☆☆ Does often pick up the ball not getting pick up on the serve

★★☆☆☆ I've tried using this app, but it had difficulty recognizing markings even though the court is almost new.

★★☆☆☆ Why does it need access to my contacts in order to function? Who knows what else it is looking to access? Clipboard too?!?

★★☆☆☆ I served 10 times, and it didn't calculate one of them😡 total rip off! Had to pay $6 to actually track the speed, but it didn't even track. Very glitchy and doesn't work at all!! Don't waste your time downloading this stupid app!