Here is a wearable device that tracks your jumps. The VERT is a wearable jump rate monitor that provides you with a non-invasive way to monitor your performance. The device pairs with an iOS app and gives coaches jump rate, jump height, and other jump-related measurements. It tracks motion in all directions and uses a proprietary algorithm to measure vertical height. You can use the VERT to stay injury-free, perform better, or simply count your jumps during a jump rope workout. The device sets you back $124.99.