Recording a jump in Free jump mode — Docs

Stand your phone upright at waist height, step back until your whole body fits the on-screen guide, and jump. Metric Jump reads height, impulse, takeoff velocity and reactive strength from the camera alone, with no mat and no sensors. It runs on iPhone and iPad.

On Free, Metric Jump records your baseline test and one free 24-hour pass. After that, recording needs a day pass, Jump Pro or Ultra. See Subscriptions.

Choose a mode

The mode name sits at the top of the capture screen. Tap it before you tap Start.

Free jump — face the phone and jump when you like. Metric Jump classifies each rep as a CMJ, squat jump, Abalakov, single-leg jump or drop jump. See Jump classification.
Repeat jump — stand side-on and hop. Metric Jump scores each series as a 10/5 or a 5/3 test. See Repeat jumps & hops.

This doc covers Free jump.

The mode locks once the test starts. Metric Jump keeps your last choice for the next recording. Onboarding and the baseline test always use Free jump.

Position the phone

Prop the phone on something stable. Use a tripod, a wall, or a bench. Any support that does not move mid-set works.
Keep the phone upright. Position it at about waist height.
Step back. Stop when your whole body sits inside the on-screen frame guide.

Your jump leaves the guide at the top. That is normal.

The most common setup mistake is standing too high in the frame. Adjust the phone’s angle so your body sits low in the shot, with your ankles near the bottom edge of the video.

Leave room above your head

Metric Jump checks that you have about 40 cm of clear space above your head before you jump. Without it, your head leaves the frame at the top of a good jump, and the height reads low.

If the space is short, Not enough headroom appears. Adjust the phone so your feet sit nearer the bottom of the frame. The closer you stand, the lower your feet need to sit.

Calibrate before each set

Before each set, Metric Jump finds you in the frame and tunes to your height and your distance from the camera. It uses that calibration for scale and gravity. Calibration starts by itself after you step into frame and stand still.

Stand tall and still in the middle of the frame.
Hold the pose until the calibration ring completes, about 1.5 seconds.
Jump after the ring clears.

After calibration, take off and land on that spot for every jump. If you drift towards or away from the camera mid-set, the numbers lose accuracy.

Record your jumps

Jump naturally. Do not shuffle or reposition your feet too far at takeoff.
Take off and land on roughly the same spot each rep.
For multi-rep sets, return to a tall stand between jumps. Let your score fade from the screen before the next jump.

Metric Jump ignores a rep where your feet never leave the floor. A dip, a calf raise or a reset between jumps does not count as a jump.

Warnings on the capture screen

Metric Jump shows one of these when it cannot measure you well. Fix the cause and the warning clears.

On screen	What to do
Too close	Move back until your whole body fits.
Too far	Step closer.
Feet out of frame	Step back so the camera sees your feet.
Out of frame	Step into the middle of the frame.
Not enough headroom	Adjust the phone so your feet sit nearer the bottom of the frame.
Keep device upright	Stand the phone up straight. It is tilted too far forward or back.
Turn the phone portrait	Turn the phone upright. It is on its side.
Unstable	Use a tripod or a solid surface at waist height.
Hands on hips	Lower your arms to your hips before calibration.
Low light or Low confidence	Metric Jump cannot see your body clearly. Add light, or stand against a plainer background.