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"Finally. I've always wondered why this didn't exist already." - Pro Dunker

Jump higher using your Apple Watch

Become more explosive. Track jump height, power, and asymmetry anywhere using just your Apple Watch.No force plates. No jump mats. No cameras.

• Benchmark your vertical free ➔

Just strap to your ankle and jump on the surface you already play on.

"Countermovement jump and squat jump are the most reliable and valid field tests for the estimation of explosive power of the lower limbs"
_{Markovic 2004. J. Strength Cond. Res.}

• Lab-grade metrics

The force plate you're already wearing

Jumpable brings you everything you need to measure, manage, and improve your vertical.

Jump HeightFlight TimeGround Contact TimeReactive Strength Index (RSI)Peak metrics at Takeoff / LandingShare metrics and curves

Scroll through every jumpAssign L / R / both legsPowerVelocityForceRate of Force Development (RFD)

• Benchmark your vertical free ➔

High-fidelity jump measurements are no longer limited to the pros.Our goal? Help you crush your goals, wherever you are in your training or rehab journey.

"A young athlete who returns to sport after ACLR may be at a 30 to 40 times greater risk of ACL injury. Activity modification, improved rehabilitation and return-to-play guidelines, and the use of integrative neuromuscular training may help athletes more safely reintegrate into sport and reduce second injury."
_{Wiggins 2016. Am J. Sports Med.}

• Return-to-sport testing made easy

Remove the guesswork

Get back to your sport safely with the objective evidence needed to optimize recovery.

Assess your technique

Share stats with your coach or clinician, and export CSV data with power, velocity, force, and RFD curves directly from your Apple Watch.

Progress, quantified

Evidence-backed insights to guide your return to play

Pre-injury Baseline

Find out what your 100% looks like.

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Recovery Milestones

Measure your progress with data.

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Load Progression

Add intensity at the right time.

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Left vs. Right Asymmetry

Identify and address hidden weakness.

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Return-to-Sport Confidence

Step back on the field with evidence.

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Reduced Re-injury Risk

Catch performance drops before they
become a risk of re-injury.

"Vertical jump tests are more sensitive in revealing asymmetries in performance metrics at the time of return to sport after ACL reconstruction"
_{Kotsifaki 2023. Br J. Sports Med.}

Frequently Asked Questions

Still have questions? We're here to help.

• Contact Us

Benchmark your vertical now

Track every jump. See progress. Perform better.

• Benchmark your vertical free ➔

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© 2026 Callosum AI Inc.
All rights reserved.

Pricing

• Your data, secure on your device

A biomechanics lab you already wear, for a fraction of what a force plate costs.Hate subscriptions? Check out our lifetime plans.

• Benchmark your vertical free ➔

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© 2026 Callosum AI Inc.
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About

I'm Burhan, founder of Jumpable.Vertical jump is the cleanest readout we have for lower-body explosiveness. Pro teams use it to predict on-field performance. Rehab specialists use it to make return-to-sport decisions. Getting a high-fidelity measurement has always required a force plate, a lab, and a specialist to run it.I've spent 15 years in sensing and control systems, with most of my early career in biomechanics. I built predictive algorithms for joint kinematics and muscle forces in cyclists, to estimate cycling power and quad/hamstring recruitment on a low-cost wearable, and modeled how motion environments affect postural stability for personnel onboard marine craft. Different problems, with the same underlying engineering to extract meaningful dynamics of the human body from noisy sensor data.Jumpable is that work applied to the watch already on your wrist. It samples motion 800 times per second and reports jump height, power, velocity, and force with force-plate fidelity. On two legs or one, anywhere you want to train.If you're an athlete or coach chasing peak output or a clinician guiding someone back from injury, I built Jumpable so the measurement that matters most isn't locked behind a lab door.

• Benchmark your vertical free ➔

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© 2026 Callosum AI Inc.
All rights reserved.

Welcome NBPTA Members

6 months of Jumpable Elite, Free.

• Redeem on the App Store

Requires Apple Watch Series 8 or newer.
Redeem by July 31, 2026.
 
Questions or feedback: [email protected]

Jumpable turns an Apple Watch into a jump testing tool: vertical jump height, reactive strength, peak power, velocity, force, and exportable data, without a force plate.It's our thank-you for what you do for basketball athletes.Tap below and your code (NBPTA) is applied automatically. Nothing auto-renews and there's no payment info to enter. After 6 months, access simply ends.

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Last Updated: June 8, 2026Jumpable is made by Callosum AI Inc. Here is the whole thing in a sentence: the app has no accounts and never asks who you are, your jump data lives on your own devices, and the only thing we collect is anonymous motion data to make the measurements better.What we don't collect
No name, email, phone number, or location. No account, no login, no sign-up. We don't track you across other apps, build a profile of you, or sell data to anyone. Nothing here identifies you, because we never ask for it.Your jumps stay on your devices
Every jump you record, along with your history and stats, is calculated and stored on your Apple Watch and iPhone. We don't keep a copy and we can't see it. Delete the app and it's all gone. There's no account to close.What we do collect
To keep improving how Jumpable measures jumps, the app sends anonymized recordings of jumps to Google's cloud services, which host our data. Recordings hold raw sensor signals and the numbers we calculate from them, like height, force, and timing. It carries no name, email, location, or health record, so it can't be traced back to you. We only use it to refine the algorithms, never for ads or profiling. We keep these recordings only as long as they're useful for improving Jumpable's measurements.Apple's sensors
Jumpable reads motion from your Apple Watch through Apple's Core Motion framework, which is governed by the permissions you grant on your device. You can turn that access off anytime in Settings.Kids
Jumpable isn't meant for children under 13, and we don't knowingly collect anything from them.Updates and contact
We follow the privacy laws that apply to us. If this policy changes, the date at the top changes with it. Questions are welcome at [email protected].

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All rights reserved.

Terms of Use

Last updated: June 8, 2026By downloading or using Jumpable, you agree to these terms. If you don't agree, please do not use the app.Who can use Jumpable
You must be the age of majority where you live to agree to these terms, or have a parent or guardian agree for you and supervise your use. Jumpable isn't intended for children under 13.Your license to use the app
We give you a personal, limited, non-transferable license to use Jumpable on devices you own. Please don't use it in any unlawful way.Purchases and subscriptions
Jumpable's Pro and Elite features are sold as in-app purchases through Apple. Subscriptions (monthly or yearly) renew automatically unless you cancel at least 24 hours before the current period ends. Lifetime unlocks are a one-time purchase. Apple handles billing, renewals, and refunds; manage or cancel anytime in your App Store settings. Deleting the app on its own doesn't cancel a subscription.Apple's role
You buy and run Jumpable through Apple's App Store, so Apple's terms also apply, including its standard end-user license agreement (EULA).Jumpable isn't medical advice
Jumpable is for fitness and athletic training, not medical care. It doesn't diagnose or treat anything, and it isn't a substitute for a clinician. Talk to a qualified healthcare provider about any medical condition, and before you start a new exercise program.You use it at your own risk
Physical activity carries real risk, including the possibility of injury or death. By using Jumpable, you accept those risks and agree to train within your own limits and judgement.Secure your watch
Before you jump or move, make sure your Apple Watch is fastened properly. A loose watch can damage the device or injury you or someone near you, and keeping it secure is your responsibility.Measurements are estimates
Jumpable uses sensors and algorithms to estimate your jumps. They're good, but they're estimates meant for general training. How the watch sits, your technique, your equipment, and the conditions around you can all affect the metrics.No warranty
Jumpable is provided "as is", with no warranties of any kind, whether about accuracy, reliability, or fitness for a particular purpose.Limit of liability
To the fullest extent the law allows, Callosum AI Inc. is not liable for any damages arising from your use of the app, whether direct, indirect, incidental, special, or consequential.Governing law
These terms are governed by the laws of British Columbia, Canada. If your local consumer-protection laws give you rights that can't be waived, those still apply.Ending your use
You can stop anytime by deleting the app. To stop subscription billing, cancel through Apple first. We may suspend or end your access if you break these terms. The disclaimers and the limits on our liability stay in effect afterward.Changes and contact
We may update these terms from time to time. Questions about these terms are welcome at [email protected].

• Benchmark your vertical free ➔

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All rights reserved.

We'd love to hear from you

Questions, ideas, or feedback about Jumpable? We're all ears.

• Benchmark your vertical free ➔

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© 2026 Callosum AI Inc.
All rights reserved.