Measure it. Train it. Watch it climb.
Dunkable measures your True Vertical from slow-mo video on your iPhone, shows exactly how far you are from the rim, and gives you a training programme that changes as your numbers do.
Coming very soon
Dunkable is with Apple for review. It lands on the App Store shortly, free, for iPhone on iOS 17 or later.
Free. iPhone, iOS 17 or later.
The number that matters
See exactly how far you are from the rim
Touch the rim, grab the rim, dunk. Dunkable turns your True Vertical and your standing reach into one honest figure: the centimetres of jump still between you and each of them.
That number sits on the home screen and shrinks as you train. It is the whole point of the app.
How it measures
240fps. 19 tracked joints. Physics does the rest.
Your phone records the jump at 240 frames a second. Dunkable finds the exact frames your feet leave the floor and touch back down, and hang time gives the height. It is the same flight-time method sports labs use with force plates.
Frames per second
240Enough resolution to place take-off and landing to the frame.
Tracked joints
19Pose tracking checks the shape of the rep, not just the timing.
Frames uploaded
0Every frame is processed on your phone. The video never leaves it.
One trusted number
Open the app, jump, know
1
Prop up your phone
Dunkable checks the framing and tells you when the phone is steady enough. Then it counts you down and records on its own.
2
Jump
One clean countermovement jump. No run-up, no reaching arm, no gaming the number.
3
Get your True Vertical
The rep is analysed on your phone and your number is on screen in seconds, with a slow-mo replay so you can check the frames yourself.
The technique guard
Reps that cheat the timer get rejected
Pulling your knees up mid-air keeps your feet off the floor for longer and fakes extra hang time. Dunkable checks your legs are long at take-off and at landing, and throws out reps that do it.
If a rep cannot be read cleanly, the app tells you to go again rather than guessing. Only clean reps count. That is what makes your number real.
Why your number reads lower
Gym tests measure more than your jump
Jump-and-reach tests bundle three extras into the figure: your heels rising before take-off, a reaching arm, and usually a run-up.
About 11cm of it
In a 440-athlete study the same jumps scored roughly 11cm higher on a Vertec than by flight time (Muehlbauer et al. 2017).
12 to 14cm is heel rise
Your body is already 12 to 14cm higher at take-off than standing flat, before you have jumped at all (Aragón-Vargas 2000).
True Vertical includes none of it
Which is why everyone's reads lower. Dunkable tracks those extras separately, at the rim, through your rim checks, where they actually matter.
Train
The programme changes as your numbers do
Answer a few questions about your reach, your training history, your kit and the days you can train. Dunkable builds a weekly plan from that, then adjusts it as you log sessions.
Three weeks build, the fourth banks it. Finish drills cleanly two sessions running and they step up. Report soreness or pain and the plan backs off. Every exercise cites published research.
Where you stand
Five tiers, from Rookie to Poster
Bands come from published flight-time jump studies, the same method Dunkable measures with.
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Rookie
Men under 30cm · Women under 22cm
Where everyone starts. Most people who have never trained a jump are here.
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Hooper
Men 30 to 40cm · Women 22 to 30cm
Past the untrained average. The jump training is doing its job.
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Bouncy
Men 40 to 50cm · Women 30 to 37cm
Around the average for the physically active. Real bounce.
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Rim Raider
Men 50 to 60cm · Women 37 to 45cm
Elite territory. Sprinters and jumpers who train this for a living sit here.
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Poster
Men 60cm and up · Women 45cm and up
The best tested national-team athletes live here. Rarefied air.
Gym jump-and-reach numbers sit about 4 inches higher and do not compare. You can change the comparison group in Settings.
Private by design
All processing on your phone. Your footage never leaves it.
Dunkable has no servers, no accounts and no analytics. Your clip is written to temporary storage, analysed, and deleted when you leave the result screen. It is only kept if you tap Save or Share yourself.
There is no sign-up and nothing to hand over. Delete the app and every jump you have logged goes with it.
Questions
The things people ask
What does Dunkable measure?
Your True Vertical: how high your body actually rises from a standing start. Your phone films the jump at 240 frames a second, Dunkable finds the frames your feet leave the floor and land again, and hang time gives the height. It is the flight-time method sports labs use with force plates.
How accurate is it?
Dunkable is checked against people tagging the take-off and landing frames by hand, rep by rep. That work is still running, so there is no accuracy figure on the box yet. You will get one when it is earned. What holds today is the honest part: if a rep cannot be read cleanly, Dunkable tells you to go again rather than guessing.
Why is my number lower than the one I got at the gym?
Jump-and-reach tests bundle three extras into the number: your heels rising before take-off, a reaching arm, and usually a run-up. In a 440-athlete study the same jumps scored about 11cm higher on a Vertec than by flight time (Muehlbauer et al. 2017). Most of that gap is heel rise alone, because your body is already 12 to 14cm higher at take-off than standing flat (Aragón-Vargas 2000). True Vertical includes none of it. Dunkable tracks those extras separately, at the rim, where they actually matter.
Can I cheat it?
Pulling your knees up mid-air keeps your feet off the floor longer and fakes extra hang time. Dunkable checks your legs are long at take-off and landing, and rejects reps that cheat the timer. Your number is real.
Does my video get uploaded anywhere?
No. Every frame is processed on your phone. The clip is written to temporary storage, analysed, and deleted when you leave the result screen. It is only kept if you tap Save or Share yourself. Dunkable has no servers to upload to.
Do I need an account?
No. There is no sign-up, no password and no email address to hand over. Open the app and measure.
What do I need to film a jump?
An iPhone running iOS 17 or later, something to prop it against, and enough room to jump. Dunkable talks you through framing and stability before it records, counts you down, and analyses the rep on its own.
What does it cost?
Dunkable is free to download, and measuring your True Vertical is free. A paid tier for the training programme is planned for later. Nothing is charged today.
Is there an Android version?
Not yet. Dunkable is iPhone only for now. Android is on the roadmap, but measuring from video needs the camera to behave predictably, and that takes calibration work per device. No date promised until it measures as well as the iPhone version does.
Is it safe for younger players?
Dunkable asks your age bracket during setup and holds back the heavier plyometric work for under-18s. It is a training app rather than a medical one. Train within what your body tells you, and see a physio or a doctor about any pain that does not settle.
Find out what your jump actually is
Free, on iPhone. One trusted number, and a plan to move it.
Free. iPhone, iOS 17 or later.