Jumping rope is one of the best cardio exercises you can do. And now you can jump rope smarter with the TANGRAM SmartRope Rookie Smart Jump Rope. This jump rope connects to your smartphone via Bluetooth to track and monitor your workout. It can give you all the stats you need about your jump count, calories burned, and time spent jumping. Also, this workout gadget will keep you motivated by allowing you to unlock rewards, challenge other users, and do interval training. What’s more, the rope is adjustable so that it’s the perfect length for you rather than too big or too short. Finally, the Rookie has a coin battery that lasts for nine months. This device brings old-school jump rope into the tech age.