PocketAngle: Protractor

Measure angles on your screen, in a photo, or in a camera view with PocketAngle. A clear protractor, three-point angle tool, level, and calibrated ruler help with geometry, crafts, and everyday alignment.

ANGLE MEASUREMENT
• Move the protractor center and align its two rays. Read forward and reverse semicircle scales.
• Drag A, B, and C on a photo or camera image, with B as the vertex.
• Switch between interior and exterior angles and choose a tool color.
• Freeze the camera background while keeping measurement points editable. Zoom and pan photos or frozen images for closer alignment.

LEVEL & RULER
• Check flat surfaces with a bubble level or use edge mode for tilt and plumb readings.
• Hold a reading, set a relative zero, or restore the default gravity reference.
• Calibrate the screen ruler against an object of known length, then use two cursors to read millimeters, centimeters, or inches.

SAVE & SHARE
Export the visible measurement area as an annotated image, save it to Photos, or use the system share sheet. Basic export includes a small watermark.

OPTIONAL PRO MEMBERSHIP
Choose a monthly or yearly auto-renewable subscription, or a one-time lifetime purchase, for multiple angles in the same image and watermark-free exports. Single-angle measurement, the protractor, level, ruler, and local guides remain available without Pro.

Monthly and yearly subscriptions renew automatically unless canceled at least 24 hours before the current period ends. Payment is charged to your Apple Account at purchase confirmation. Manage or cancel subscriptions in your App Store account settings.
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DESIGNED FOR IPHONE & IPAD
Use portrait or landscape, light or dark appearance, and English or Simplified Chinese. No account is required. Camera images and selected photos are processed on your device.

MEASUREMENT NOTES
Photo and camera angles are two-dimensional. Perspective and manual alignment affect results; they do not determine true spatial angles. Calibrate the ruler before measuring physical length. Device sensors and calibration affect level and ruler readings. PocketAngle is an everyday reference tool, not a substitute for professional measuring equipment.