The most efficient cardio exercise is now even more useful with Tangram's Smart Skipping Rope Rookie. This is a completely adjustable, battery-powered smart jump rope that connects to the iOS/Android/Apple Watch SmartRope App to track your cardio exercise via Bluetooth. The app keeps users motivated and challenged by monitoring your data and progress, doing interval training, offering unlockable rewards, and allowing the option to connect with other SmartRope users.