Protractor: Angle Measure

Protractor is the most accurate digital protractor, angle finder, and angle ruler for Android. Measure any angle from 0° to 360° with a tap on the screen or by tilting your phone, using the built-in gyroscope and sensor fusion for 0.1° precision.

▶ MAIN FEATURES
• Measure angles from 0° to 360°
• Screen-touch two-point angle mode
• Gyroscope physical-angle mode (tilt your phone against any surface)
• Plumb / vertical reference line
• Pitch & roll readout
• 0.1° accuracy via sensor fusion
• Hold mode to freeze a reading
• Degrees, radians, and gradians
• Dark mode
• Works fully offline

▶ HOW TO USE
1. Open the app and pick screen-touch or gyroscope mode.
2. For on-screen angles, tap two points to set each side.
3. For physical angles, rest your phone on the surface and read the tilt.
4. Tap Hold to lock the value, then switch units if needed.

▶ WHO USES IT
• Students and math teachers
• Carpenters and woodworkers
• Tile and roof installers
• Architects and designers
• Sewing and quilting enthusiasts
• Engineers
• DIY hobbyists

No account and no sign-up required, and every tool works offline. Turn your Android phone into a precise protractor and angle finder today.