Detect side lean by comparing head center, shoulder midpoint, and shoulder tilt. Works with your phone camera, laptop camera, or webcam. It runs entirely in your browser and the camera feed never leaves your device.
Prop your phone at desk height for front checks, or turn it sideways for side-view posture scans. Same test, same URL, no app.
Open phone linkThis check reads your side lean from a short on-device camera scan and compares it against an evidence-based comfort range (< 8%). The model maps the joints involved and averages the angle so a single fidget doesn't skew your result.
Green means you're inside the healthy range. Amber means you're drifting and it's worth a small adjustment. Coral means the angle is past the comfort line for long enough to cause strain. Your number updates live, so you can watch a fix land in real time.
One test reads one signal. If you want this checked continuously — combined with posture, eye strain and fatigue, with live nudges and a progress history — that's what Pro does. It turns a one-off number into a habit that holds.
Side lean often appears when the screen, mouse, notes, or arm support pulls your body away from center during focused work.
Move the item you reach toward most often closer to your midline, then re-run the check and compare the visible lean signal.
It compares head center, shoulder midpoint, and shoulder-line tilt from a front-facing camera view.
No. It is an ergonomic setup prompt that can help you notice a repeated desk pattern.
Yes. A laptop camera works if your head and both shoulders stay visible in the frame.