Obi Motion

It knows which way your knee turned.

Small wireless nodes worn at the joints — knee, hip, shoulder, wherever the movement lives — reading angle and rotation directly, in three dimensions, 120 times a second.

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120Hz

Sample rate

9-axis

IMU sensing

Nodes supported

18hr

Battery life

What it does

Built for one job, done exactly.

9-axis motion sensing

Accelerometer, gyroscope, and magnetometer fused per node for drift-free joint angle over long sessions.

Multi-node body coverage

Start with one node on the knee that matters most, or scale to eight nodes for a full-body motion capture rig.

Placement guidance

The app walks you through exactly where each node goes, confirming correct placement before a session starts.

Motion quality score

Every rep is scored for smoothness and control, not just range — catching jerky compensation a mirror would miss.

Specifications

The technical details.

Sensing9-axis IMU (accel + gyro + magnetometer)

Sample rate120 Hz

Nodes supportedUp to 8 simultaneous

ConnectivityBluetooth Low Energy, multi-node mesh

Weight per node9g

Battery18 hours continuous use

MountingReusable adhesive strap or clip

Water resistanceIPX5

Where it's used

Real scenarios, real data.

Strength

Bar path & joint tracking

See the exact rotation of a squat or deadlift, rep by rep.

Sport

Swing and throw mechanics

Capture rotational speed and sequencing for golf, tennis, or throwing motions.

Rehab

Range-of-motion tracking

Measure real degrees of recovery, exportable straight into a clinical chart.

Ready to see it live?

Explore the full Obi platform or back the campaign for early pricing.

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