Jumpable vs Simple Sprint Timer

Jump higher, using just your Apple Watch. See exactly how high you jump and how explosive you are, then watch both climb. No force plates. No jump mats. No cameras. Strap the watch to your inner ankle, jump, and get lab-grade numbers in seconds. Trusted by strength coaches and physiotherapists. Over 1,100 jump sessions recorded. Accurate to 0.5 inch, sampled at 800 Hz - the precision that used to cost thousands of dollars and never left the lab. "Finally. I've always wondered why this didn't exist already." - Pro Dunker "The Jumpable app provides the convenience and ease of use that conventional jump measurement devices do not... I would recommend anyone interested to give it a try." - Kevin Hirose, Strength & Conditioning Coach "The interface is easy to use. It looks like something Apple made." - Physiotherapist WHY JUMPABLE? A force plate stays restricted to a lab and costs thousands. Jumpable runs the same kind of measurement from the Apple Watch on your ankle, so you can test your vertical on the court or surface you actually play on and see whether you're getting more explosive over time. Send any session to your coach or clinician straight from your watch. HOW IT WORKS STRAP: Fasten your Apple Watch to your inner ankle. TAP: Set a recording duration and tap Play. RECAP: Jump, then read your full metrics the instant you land. WHAT YOU GET • Countermovement Jumps (CMJ) and Squat Jumps (SJ) • Jump count and height • Flight time, Ground contact time, Reactive Strength Index (RSI) • Peak power, velocity, force, and rate of force development (takeoff and landing) • CSV export with power, velocity, force, and RFD curves (Elite) ACCURACY Vertical height: ±0.5 in (±1 cm) REQUIREMENTS Apple Watch Series 8, Ultra 1, SE 2, or newer (S8 chip or later) For fitness and training only. Not medical advice. See terms: www.jumpable.com/#terms VISIT www.jumpable.com

I originally built this app for my wife, and wanted to share it in case anyone else finds it useful. It's still in very early beta — expect rough edges, and feel free to reach out with feedback. I've released the source code for free on GitHub in case anyone wants to tinker with it: https://github.com/jasonnmark/SprintTimer