Protractor Fold

Protractor Fold turns your iPhone into a precise, easy-to-read protractor. On a foldable iPhone, the hinge does the measuring. Open the phone like a of compasses and the needle follows, to a tenth of a degree. Lay it against a corner, a int or a mitre and read the angle at a glance. On any other iPhone, Protractor Fold uses the compass. Point the phone along one line, tap to start, then turn it to the next line and read how far you've turned. FEEL EVERY DEGREE A light tick for every degree, a firmer one every 5°, and a strong one every 10°, just like the marks on a real protractor. You can feel your way to an angle without oking. Clicks can be turned off, and they follow your silent switch. A CLASSIC PROTRACTOR • School-style 180° scale with inner and outer number rows • Large readout to 0.1° • Hold to freeze the reading so you can read it at your own pace • Works on both the inner and outer displays of a foldable iPhone PROTRACTOR PRO One purchase removes ads and unlocks: • Target angle: set an angle and get a stronger tick as you close in, then a chime when you hit it • Zero here: measure relative to any starting position • Supplementary angle (180 − θ) • Slope as a percentage and as rise : run, for ramps, roofs and drainage • Saved measurements with notes • Fine calibration PRIVATE BY DESIGN Your measurements and settings stay on your device. No account, no sign-up, and the compass needs no location permission.