Ruler & Measure - Screen Ruler

Turn your Android phone into a handy ruler. Ruler & Measure uses your screen to display a real-size ruler for quick length measurements. Whether you need centimeters, millimeters, or inches — just place an object on your screen and read the scale. SCREEN RULER • Real-size ruler displayed on your phone screen • Horizontal and vertical scales for flexible measurement • Switch between cm, mm, and inch units with one tap TWO-POINT MEASUREMENT • Tap two points on the screen to measure the distance between them • Results shown in all three units at once (cm, mm, inch) • Copy results to clipboard for easy sharing DPI CALIBRATION • Automatic screen DPI detection for accurate scaling • Manual calibration slider to fine-tune measurements on your device • Adjust between 80% and 120% for the best accuracy CUSTOMIZATION • Choose ruler color (dark, light, blue, green) to match any background • Light and dark theme that follows your system • Available in many languages GOOD TO KNOW • This is an approximate measurement tool for everyday use • Accuracy depends on your device's screen DPI • Works best for small objects that fit on your screen • No internet required for measurements