0°
Sensors off
How to measure
- Zero, move, save. Strap or hold the phone on the moving segment, tap Zero at the start position, move through range, then Hold or Save at end range.
- Two-segment method. Zero with the phone on the proximal segment, then place it the same way on the distal segment. The reading is the angle between them.
- Vertical planes only. The phone reads its tilt against gravity, so the motion must happen in a vertical plane. Motion along a flat surface (for example shoulder abduction in supine) will not register. The readout goes from 0° to 180°.
- Lock portrait orientation in Control Center so the screen does not spin while the phone is on the limb.
- Wait for Steady. The chip turns green when the reading settles. Tap Peak to recall the largest angle since the last Zero.
- Reference values are AAOS adult norms and vary by source and age. This is a clinical aid, not a certified medical device.
Take a photo with the joint at end range, then tap three landmarks. Photos stay on this phone and are not saved to your camera roll.
Shoot square to the plane of motion, with the joint centered and the camera at joint height.
–°
Session log
No measurements yet. Saved readings from Sensor and Photo appear here, ready to copy into your note.
The log stays on this phone only. Enter no patient names or identifiers.
Saves a copy of this app as an HTML file to your Downloads or Files, so you have it outside the cloud.