Protractor

1.7.00

EXA Tools

4.22

5,690 reviews

1,000,000+
Downloads

Free

Check angle and slope. Use the camera view !!!

Pros & Cons

Camera-based measurements with real-world object alignment
Premium Polygon Measurement with color customization and helpers
Supports multiple angle units (percent, radian)
Screenshots available across all modes

Not ranked in any top lists currently
Lacks traditional level or ruler tools (level, ruler, meter) that some competitors offer

About Protractor

Protractor is a tools app developed by EXA Tools.

How many times has Protractor been downloaded?

Protractor has been downloaded 1.6 million times. In the last 30 days, the app was downloaded 17 thousand times.

What is the rating of Protractor?

Protractor is rated 4.22 out of 5 stars, based on 5.7 thousand ratings.

Is Protractor free?

Protractor is free to download. The APK download size is 6.92 MB. The latest version available is 1.7.00. The last update was on January 14, 2026.

What are the requirements for Protractor?

Protractor requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play February 2016.

Description

Protractor - smart instrument to measure angles. Turn on the camera mode and measure the angle of buildings, mountains, or any other object around you.

More data about Protractor

Price	Free to download
Total downloads	1.6 million
Recent downloads	17 thousand
Rating	4.22 based on 5.7 thousand ratings
Ranking	Not ranked
Version	1.7.00
APK size	6.92 MB
Number of libraries	19
Designed for Android	5.0+
Suitable for	Everyone
Ads	Contains ads

App Performance Report

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Alternative downloads for the Protractor app

Protractor compared with similar apps

Common keywords of similar apps

View Premium Shape Check Turn Modes Switch Additional Polygon Draw Image Lines Units Angle Camera Mode Measure Screen Plumb Measurements Protractor Slope Angles Object Touch Bob Measurement

Keywords missing from this app

Level App Tool Device Measuring Bubble Surface Ruler Meter Tools Finder Clinometer Ar Features Calibration Accuracy Spirit Support Horizontal Vertical Recent Precise Display Easy Distance Digital Laser Free Frame Phone Leveling Target Set Smart Surfaces Objects

Google Play Rating history and histogram

Downloads over time

Protractor has been downloaded 1.6 million times. Over the past 30 days, it averaged 570 downloads per day.

Changelog of Protractor

Show changelog

Developer information for EXA Tools

EXA Tools

exatools@gmail.com

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Comments on Protractor for Android

★★★★★ John Suarez · Jul 15, 2025

Works as intended. The camera feature is very useful.

★★★★★ Su · Feb 5, 2021

Really neat. The lock and photo features are handy. Plumb tool is also cool, although it briefly confused me until I found the toggle back to basic angle measurement. Adverts are subtle enough not to interfere. Thank you.

★★★★☆ Deon Van der Westhuizen · Jul 25, 2021

So far so good. I like the clear markings. The adds only show after I used the app which is not a problem. I would like to see an indication of which side is higher when I work with small inclinations.

★★★★★ j sykes · Nov 10, 2023

Brilliant design. Also comes with a visual plumb bob. I love the way the camera can be used to view a room or object. The protractor outline overlays the camera image and can be used to measure angles, hang pictures, and predict location of wall studs.

★☆☆☆☆ Seth K · Jan 29, 2023

This app makes no sense. In one mode you can only measure an angle against a horizontal line. Another option lets you use the camera and adjust 2 angle lines independently. "This means you snap a photo then accurately measure it" is what a sane person would think. Nope. You have a live video feed and have to adjust 2 angles live while aligning the fulcrum live while trying to hold the camera steady, live. So it's about as accurate guessing the angle, but slower and more frustrating.

★☆☆☆☆ Gereth Dittrick · Nov 30, 2021

Was expecting a protractor not a level. Very misleading

Google Play Rankings for Protractor

This app is not ranked

Technologies used by Protractor

Protractor is requesting 14 permissions and is using 19 libraries.
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