2025-09-11 00:00:00 Ruler, Protractor & Bubble Level (Nuts Ruler) is a free measuring tool that allows you to easily measure length, angles, and perform horizontal/vertical calibration. 📏 Ruler App The Ruler App offers a comprehensive range of functions to fulfill all your measurement needs. With features such as unit conversion (mm to inches, centimeters to inches), length calculation, straight line measurement, area calculation, thread pitch definition, caliper, online ruler, and more, it's your go-to tool for accurate measurements. Key Features: