Protractor: Angle Finder

A protractor, angle finder and bubble level in one free app. Measure any angle three ways: lay a flat object on the screen, aim the camera at a corner, or tilt the phone against a surface. No sign-up, no internet needed.

TOUCH PROTRACTOR

Drag the arm to an edge and read the angle between them. The protractor snaps to 15°, 30°, 45° and 90°, and opens into a full 360° dial for reflex angles and miter cuts. Handy for homework, sewing patterns and workshop layout.

CAMERA ANGLE FINDER

Point at a corner and tap three points. The angle appears right in the live view. Freeze the frame to place the points exactly, then save or share the photo with the angle stamped on it.

CLINOMETER AND PLUMB BOB

Hold the phone against a wall, ramp or shelf and read the slope from gravity. It works as a digital inclinometer and as a hanging plumb bob, so you can check a post for true vertical without string. Calibrate on a surface you trust to set a real zero.

BUBBLE LEVEL

Lay the phone flat for a bullseye vial. Stand it on edge for a tube spirit level. The view switches by itself, and you can lock it while you press the phone against a frame.

EVERYDAY JOBS

Hang a picture frame straight. Measure a roof pitch. Mark a miter on a workpiece. Check a stair railing, a shelf or a satellite dish. Read the slope of a ramp or a drainage pipe.

Every reading works in degrees, radians, percent slope, mm/m, roof pitch x/12 and ratio 1:n. Hold a value on screen and long-press it to copy.

The protractor runs entirely on your phone. Your measurements are never uploaded, and there is no account to create.

• Over 70 languages

• Works offline

Popular uses: measure any angle straight from the camera picture, use the full 360° dial for reflex angles, check slopes with the inclinometer, draw and check geometry homework, and set up mitre cuts in woodworking. A digital protractor and angle finder in one app.