How to use:

1. Ask a friend to hold the camera or prop it so your knee is centered.
2. Select which leg to track (Left or Right).
3. Click Start; a 3-second countdown will begin.
4. Bend and straighten slowly; see live angle updates.
5. Click Pause to stop.
6. Use Reset Chart to clear history.
7. Click Export CSV to download data.

Expect a countdown, then live angle and continuous chart updates.

Left Leg Right Leg Start Pause Reset Chart Export CSV

Knee Angle: —°