01YOUR BENCHMARK
Vertical jump
Measure jump height with countermovement, squat, and arm-swing tests.
Height · flight time
JUMP TESTING. ONE IPHONE.
Make every
jump count.
Measure jump height. See the movement behind it. Build a clearer picture of your progress, one session at a time.
Your first countermovement session is free.
No account. No extra equipment.
For iPhone · iOS 26 or later
THE MOVEMENT BEHIND THE NUMBER
Automatic jump detection A replay for every rep Athletes & coach sessions
01 / START SIMPLE
Set it down.
Step back.
Jump.
A bench or tripod. A clear landing area. A few minutes to find your starting point.
Camera setup guide- 01
Set your frame.
Place your iPhone on a stable support. Keep your whole body, both shoes, and landing area in view.
- 02
Stand still. Then jump.
Follow the framing guidance and let the camera calibrate. Jump when you’re ready. TrackJump detects each rep automatically.
- 03
Find your next step.
Review your results alongside each clip. Save a benchmark and come back to see how you progress.
02 / TEST WITH PURPOSE
Different jumps.
A fuller picture.
Choose the test that fits your session. Keep the protocol consistent when you compare results.
02CONTACT & FLIGHT
Reactive strength
Review drop jumps and repeated rebounds, with the contact before each takeoff.
Contact time · RSI
03MATCHED COMPARISONS
Left & right
Test each leg and compare like-for-like jumps. Give both sides a clear picture.
Single-leg height · difference
Mixing it up?
Automatic sessions suggest the jump type for each rep. You can review and correct the label afterward.
03 / UNDERSTAND THE RESULT
More than
one number.
Explore an example result. Height, ground contact, and side-to-side differences answer different questions.
Countermovement jump
34.2cm
Your estimated jump height, with the timing behind it.
Illustrative data. Not a live measurement.TakeoffLanding
Flight time
528 msTakeoff velocity
2.59 m/sCamera measurements are estimates. Framing, lighting, frame rate, and technique affect results. How measurements work
04 / KEEP THE CONTEXT
A jump today.
A benchmark
for tomorrow.
Your results belong with the movement that produced them. Keep each rep, revisit the video, and compare your next session with the same test.
- Inspect takeoff and landing frame by frame
- Keep separate profiles for your athletes
- Export results and replay clips
What can I measure with TrackJump?
Record countermovement, arm-swing, squat, drop, rebound and single-leg jumps. Review estimated jump height and flight time beside the video. Contact time and reactive strength index (RSI) appear when the recording supports them; RSI-modified is shown separately.
Do I need extra equipment?
You need an iPhone running iOS 26 or later and a stable place to set it down, such as a bench or tripod. Keep your whole body, both shoes and the landing area visible. No wearable or dedicated jump sensor is required.
Can I try TrackJump for free?
Your first countermovement jump session is free, with no account required. Further recording sessions and video import require TrackJump Pro. The app shows the local subscription price and billing period before you buy.
How should I interpret the results?
Camera measurements are estimates. Lighting, framing, frame rate, technique and visibility of takeoff and landing affect the result. Review the video and compare matching tests and measurement methods over time. TrackJump is not a force plate or a medical assessment.
Can I replay and review each jump?
Yes. TrackJump saves individual jump clips beside their results. Review takeoff and landing frame by frame, inspect body markers and correct event timing when needed. You can export results and replay clips to share with an athlete or coach.
YOUR NEXT SESSION STARTS HERE
Find your
starting point.
One iPhone. Your first jump session. Let's see where you go.
Download on the App Store
First countermovement session free.
Further sessions and video import require Pro.