Smart Protractor for Android

Smart Protractor is a free Android application designed for measuring angles and slopes efficiently. It features three distinct modes: touch mode for direct screen interaction, plumb mode for slope measurements using the device's weight, and camera mode that utilizes the camera for angle assessment. This versatility caters to a variety of measuring needs, making it suitable for both casual users and professionals alike.

The app supports multiple tilt units, including degrees, percent, and radians, and includes features like zero calibration and orientation sensor toggling. Its user-friendly material design enhances accessibility, while the pro version extends functionality with additional tools such as screen capture and a built-in ruler. For users seeking more measurement tools, related applications like Smart Ruler Pro are also available.