Review on Coollang Koospur Bluetooth Tennis Racket Sensor Tracker: 🎾 Motion Detector Analyzer for Android and iOS Smart Phones (Black) by Badpuppy Warton

I bought this system because Babolat decided to stop supporting the POP tennis tracker. The app for this sensor is not downloaded on Android phones. I was able to download it to my I-Pad, but it's kind of a PITA for using a second device. Hopefully there will be a solution soon, but I won't hold my breath. Also, the sensor holder isn't big enough to fit on the end of every tennis racket, except maybe for kids. And the double-sided tape used to attach the sensor to the racquet makes it impossible to install on multiple racquets. I will find a technical solution to fix this.