RightAngle PRO - Right Angle Calculator

The tool provides on‑device calculations for right‑angle geometry used by steel fabricators, structural framers, and machine installers. Users enter dimensions in the units they work with—fractional inches, feet & inches, decimal inches, or millimetres—and receive instant diagonal lengths, coordinate values, and angle measurements with up to four decimal places for sides and six for angles. A real‑time diagram updates with each keystroke, and a left/right toggle flips the orientation of the right‑rising or left‑rising triangle.

It supports eleven unit presets, including 1/16", 1/32", and 1/64" fractions, and allows custom mixes of metric and imperial units. Calculations work offline on an iPhone, with results exportable as PDFs for sharing or printing. Light and dark display modes adapt to different lighting conditions, and the app can handle ranges up to 500 km, covering both small framing components and large‑scale surveying tasks.