Qlipp Tennis Sensor QLIPP is the ultimate tennis performance sensor that fits on any tennis racquet and measures every part of your stroke, analyzing the spin, speed and sweet spot accuracy of each shot. Designed to improve your game with the most advanced analytics possible, it can wirelessly sync with your smart phone. The QLIPP sensor tracking technology is put onto the stringbed of your tennis racquet, like a vibration dampener, and begins recording your swings and movement right away. You can also share your progress with friends on your social networks and compete against others to see who's becoming the most refined player, developing additional motivation to become the best player on the court! The QLIPP APP can save and monitor each session so you can track your improvement and see what parts of your game you need to work on. It's like having your own digital tennis instructor helping you get better all the time!