This app acts as a smart instrument for measuring angles using your device's camera. It offers two free modes for measuring angles on screen or using a plumb bob for slopes, with an additional premium mode for polygon measurements.
Summarized from real user reviews of Protractor Smart. Based on 242 reviews and a 4.6/5 average, it highlights the 8 positives and 14 negatives reviewers mention most about this Utilities app.
1.6
July 25, 2025
Bug fixes and stability improvements New Premium features: - No ads - Polygon Measurement - Angle measurements on image - Angle measurements on camera preview - Color customization - Additional angle units (percent, radian) - Customizable plumb bob shapes - Laser and auxiliary lines in camera mode
More$1.99
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8 issues
App loads indefinitely
App does not launch after iOS updates
6 requests
Improve camera function (light, zoom)
Add automatic hold function
Protractor Smart is a digital instrument that allows you to measure angles using your smartphone's camera. It offers various modes to measure angles of real-world objects, slopes, and even complex shapes.
The app includes a 'Touch measure' mode where you tap the screen to define angles, and a 'Plumb bob measure' for determining slopes using a pendulum. A premium mode allows for polygon measurements by drawing shapes on screen or images.
The app offers two measuring modes, 'Touch measure' and 'Plumb bob measure,' for free. Additional features, such as 'Polygon measurement,' are available through in-app purchases, indicating a freemium model.
Yes, you can switch to camera view in both 'Touch measure' and 'Plumb bob measure' modes to measure the angles of buildings, mountains, or any other object around you. The premium polygon mode also allows you to trace shapes from real objects via the camera.
The premium mode, 'Polygon measurement,' enables you to draw any shape on your screen to check all its angles. You can do this by tracing real objects through the camera or by drawing on photos from your gallery or new pictures.
