Downloads
Check angle and slope. Use the camera view !!!
AppBrain's verdict
EstablishedPopularWell rated- Rating on Google Play
- 4.18
- 5,786 ratings
- Installs
- 1.6 million
- Last updated
- October 26, 2026
- Ads
- Contains ads
- Size
- 9.52 MB
Protractor is popular, with 1.6 million installs. Users rate it well: 4.2 stars from 5,786 ratings.
Pros & Cons
- Two free measuring modes (touch and plumb bob)
- Premium polygon measurement with customizable visuals
- Additional angle units (percent, radian) and laser/auxiliary lines in camera mode
- Ad-free experience in Premium and overall modern feature set
- Lacks built-in level and ruler tools advertised by some competitors
- Limited non-camera measurement tools beyond angle modes
- No explicit cross-device sync or cloud features mentioned
User feedback
Ratings and reviews on Google PlayComments on Protractor for Android
Google Play Rating history and histogram
Store listing
By EXA Tools, from Google PlayDescription by EXA Tools Written by the developer, not by AppBrain. Click to read.
This app includes two free measuring modes:
- Touch measure - touch the screen to set the angle (use camera view!).
- Plumb bob measure - pendulum - use to determine the slope (remember to calibrate the plumb).
In each mode, you can switch to camera view and take measurements of all objects around you.
Additional Premium mode: Polygon measurement lets you draw any shape on your screen to check all its angles. Turn on the camera to see the real object through your phone and copy its shape. You can also pick a photo from your gallery or take a new picture to draw a shape on the image. In Premium mode, you can change colors, add helper lines, and switch between different angle units.
All modes allows you to make a screenshot of anything on the screen.
Enjoy !!!
Recent changes:
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
Safety and technology
Found in the app by AppBrain- Ads
- Contains ads
- Price
- Free
- Libraries
- 20
- App size
- 9.52 MB
- Content rating
- Everyone
Technologies used by Protractor
Releases
Updates seen on Google Play- Version
- 1.8.03
- Launched
- February 2016
Alternatives
Similar apps and more from EXA Tools
Installs
Tracked by AppBrain- Last 30 days
- 13 thousand
- Per day
- 420
- 30-day average
- Play install range
- 1+ million
- Launched
- February 2016
Installs over time
Protractor has been installed 1.6 million times. Over the past 30 days, it averaged 420 installs per day.
Rankings
Google Play top chartsGoogle Play Rankings for Protractor
About the app and developer
About Protractor
Protractor is a tools app developed by EXA Tools.
Install Statistics
Protractor has been downloaded 1.6 million times. In the last 30 days, the app was downloaded 13 thousand times.
User Ratings
Protractor is rated 4.18 out of 5 stars. The rating is based on 5.8 thousand ratings.
App Information
Protractor is freely available from Google Play. The APK size is 9.52 MB. The latest APK version available is 1.8.03. The last update was on October 26, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play since February 2016.
Protractor is made and published by EXA Tools. AppBrain is an independent app data site and isn't affiliated with EXA Tools. The app name, icon, screenshots and description belong to EXA Tools and are shown as published on Google Play.
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