Fold Angle: Hinge Protractor

Fit your folding iPhone into a corner, against a door, or over a box edge, and read the angle between its two halves instantly.

Your folding iPhone already knows how far it's open. Fold Angle turns the hinge into a protractor.

Set the phone into a corner, against a door, or over the edge of a box, and read the angle between the two halves in degrees.

Tap once to hold a reading, then lift the phone away and read what it captured.

Set any angle as zero to compare two corners, or to measure how far a door swings.

A light tap every 15° and a firm one at exactly 90°, so you can feel square without looking.

Built for iPhone Duo. On other iPhones it works as a tilt meter using the motion sensors.

No ads, no tracking, no data collected.

For quick everyday checks rather than calibrated precision work.