Protractor Fold

Protractor Fold uses the hinge of iPhone Duo as a protractor. It reads the hinge sensor live and shows angles to a thousandth of a degree. INSIDE CORNERS Room corners, cabinets and window bays, read on the inner screen. OUTSIDE CORNERS Box edges, walls and beams, read on the outer screen. PIPES AND CURVES Radius, diameter and curvature of pipes, arches and curved walls. TARGETS Set an angle or radius with a tolerance. A tone sounds on target, and each saved reading keeps how far off it was. LOGS Save readings with notes and photos, keep them in named logs, and export them as a spreadsheet or PDF. ALSO - Five color themes and a night mode - No account, no ads, no tracking. Anonymous crash reports are sent only if you agree. Requires iPhone Duo.