Measure it. Train it. Watch it climb.

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.

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.

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; Wade et al. 2020). True Vertical includes none of it. Dunkable tracks those extras separately, at the rim, where they actually matter.

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.

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.

No. There is no sign-up, no password and no email address to hand over. Open the app and measure.

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.

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.

Not yet. Android is being built now, and the iPhone app comes first. There is no date. Measuring needs a camera that records genuine 240fps, and slow-mo capture varies a lot between Android phones, so it has to be checked phone by phone. Phones that pass that check will measure. Phones that do not will still get the training programme, and can track a number you type in yourself. Android will not ship until it measures as well as the iPhone version does. There is an address on the support page if you want to hear when it lands.

Dunkable asks your age bracket during setup, and that question cannot be skipped, because the answer decides how heavy the plyometric work is allowed to get. Under-18s get the higher-intensity plyometrics held back. 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.