Vertical Jump Measure: Hopmark

Measure your vertical jump with nothing but your phone. Hold it against your chest, jump, and Hopmark shows your jump height in centimetres or inches the moment you land. HOW IT WORKS While you are in the air, your phone falls freely with you. Hopmark reads the motion sensor hundreds of times per second, finds the exact moment of takeoff and landing and calculates your jump height from the flight time (h = g·t²/8), the same formula jump mats and force plates use. No video, no frame counting, no mat, no second person. WHAT YOU GET FOR FREE • Unlimited vertical jump tests with your height, flight time and rating • Dunk calculator: how many centimetres you are away from touching the rim and from dunking • Jump duel for two players: pass the phone, best of three wins • Share card with your result for your story, so your friends can try to beat it • Today's jumps on the jump wall HOPMARK PRO • No ads – Pro is completely ad-free • Analysis of every jump: takeoff speed, peak power in watts, push-off and landing force • Full history with daily best curve and a before and after card for your vertical jump training • Hop series: ground contact time and reactive strength index (RSI) • Duels and team tests for up to 8 players • Dunk forecast from your own progress Pro is available as a monthly or yearly subscription. Measuring stays free – with light ads; Pro removes all ads. BUILT FOR VERTICAL JUMP TRAINING Basketball, volleyball, sprinting, high jump or simply curious: test your vertical jump before and after a block of vertical jump training and see the gain in black and white. Every test is saved with date and time, so your jump height becomes a number you can track. HONEST NUMBERS Hopmark explains every number with a tap on "Why?". Jumps with tucked knees or a moving phone are discarded instead of inflated. The rating uses published reference values for adults, the power estimate uses the Sayers formula. Hopmark is a training tool, not a medical device. PRIVATE No account. Your jumps stay on your phone and move to a new phone with Android backup. Hopmark counts anonymous usage statistics (for example how often the Pro page is opened) without a device ID. The free version shows ads via our ad partners, personalised only with your consent. Questions or ideas: [email protected]

• Free with light ads, Pro is ad-free. • Minor improvements and stability fixes. • New: "Ad settings" lets you change your ad choices at any time. • New: Pro forever — pay once, no subscription