Real Ruler - Accurate Measure

Real Ruler turns your screen into a ruler that measures at true physical size. Most on-screen rulers are wrong because every device has a different pixel density. Real Ruler starts from a database of known devices and lets you calibrate against anything you already own, so a centimetre on screen is a real centimetre. ACTUAL SIZE, NOT APPROXIMATE Pick your device or calibrate by hand against a coin, a card, or a ruler you trust. Once it is set, it stays set. MEASURE FROM ANY EDGE Place a ruler along the left, right, top or bottom of the screen, or use more than one at a time, so you can line up whatever you are measuring the way that suits it. GUIDE LINES Drop a guide line anywhere and slide it into place to mark a measurement, compare two objects, or hold a reference while you work. Clear them in one tap. TRACK COORDINATES Turn on the crosshair to read exact positions as you move around…