How to record a jump — Docs

Metric Jump measures bodyweight jumps from a front-on angle, with no extra hardware. It finds your body, detects the jump type, and reports height, takeoff velocity, reactive strength and more straight from your phone camera.

Metric Jump is a separate app and is currently in beta.

Set up the phone

Prop the phone on something stable. A tripod, a wall, or anything that won’t move mid-set.
Keep it upright, positioned between knee and stomach height.
Step back until your whole body sits inside the on-screen frame guide. Your jump will leave the guide at the top, and that’s fine. The app will guide you with on-screen prompts.

Light and background

Avoid heavy backlight. A bright window or a fluorescent strip behind you makes tracking harder.
Avoid a dark room with dark clothing. Metric Jump has to see your whole body to track it and detect the jump.

Calibration

Before each set, Metric finds you in the frame and tunes to your height and distance from the camera. It starts automatically once you step in and stand still.

Metric Jump uses that still moment to calibrate scale and gravity, for accurate real world data.

Stand tall and still in the middle of the frame.
Hold the pose until the calibration ring completes, about 1.5 seconds.
Once it clears, you’re clear to jump.

Once calibration is complete, this is now where you should aim to take off and land for every jump. If you drift too far towards or away from the camera mid-set, the numbers lose accuracy.

Jumping

Jump naturally. Don’t shuffle or reposition your feet at takeoff.
Take off and land on roughly the same spot each rep.
For multi-rep sets, return to a tall stand between jumps and let your score fade from the screen before the next one.

Why setup matters

Every metric comes from how your centre of mass moves on screen. If the camera can’t see your full body, or calibration is off, the maths has nothing solid to work from.

For how each rep gets labelled, see Jump classification. For what the numbers mean, see Jump metrics.