RealRuler - Ruler & Protractor

A real ruler, right on your phone. RealRuler turns your phone screen into a ruler, a caliper, an area gauge and a protractor. When you need the size of something on your desk, when you want to check a product's dimensions, when a quick DIY job needs a measurement, when you need to know the angle between two edges, measure it right away — no ruler or protractor required. ■ Ruler An on-screen scale in millimeters, centimeters or inches. Line the object up with the edge of the scale and drag the line to its other end. ■ Caliper Two lines on screen, like the jaws of a caliper. Put the object between them and drag them to fit. ■ Area Line the object up with the top-left corner and drag the opposite corner. Width and height, read together. ■ Protractor Put the corner of the angle at the bottom center and match the two arms to its sides. Reads from 0 to 180°. ■ Made to be accurate Every phone screen is a little different. Calibrate once with a bank card — about a minute — and fine-tune with − and +. RealRuler measures the card once more to check before it saves. ■ Handy details Switch between inch and cm right on the measuring screen, or choose mm in settings. Inches as decimals or 1/16 fractions. The measuring screen works in landscape or reverse landscape. Measuring works fully offline. ■ Good to know RealRuler is free and supported by ads. There are no ads on the measuring screen. An optional pass (1 day, 7 days or monthly) removes ads, keeps up to 100 records, keeps the screen on past the 5-minute limit and adds 1/32-inch fractions. All passes have the same benefits — only the length differs. You can also watch an ad to use one of these features for 24 hours. Accuracy depends on your screen and calibration. Not intended for safety-critical, medical or legal measurement. A real ruler, right on your phone.