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Best Protractor App

248+ iOS apps curated and reviewed

3.8 avg rating
17 free apps
Updated August 2026

Protractor for Angle Measuring is the household name in protractor app, but it's far from the only option. We track 248+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Protractor App (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Protractor for Angle MeasuringProtractor for Angle MeasuringFree4.5★ (1K)YesYesAug 2026
2Protractor+Protractor+Free4.1★ (10K)NoYesAug 2026
3MeasureMeasureFree3.1★ (1.6K)NoNoAug 2026
4Protractor SmartProtractor SmartFree4.6★ (236)NoYesAug 2026
5Protractor - Angle MeasureProtractor - Angle MeasureFree3.9★ (11)YesNoAug 2026
6Protractor (Angle measurement)Protractor (Angle measurement)Free3.0★ (2)YesNoJul 2026
7Smart ProtractorSmart ProtractorFree—NoYesAug 2026
8Angle Gradient InclinometerAngle Gradient InclinometerFree4.4★ (215)YesNoAug 2026

Top Picks for Protractor App

Protractor for Angle Measuring#1

Protractor for Angle Measuring by AppLiks Sp. z O.O.

Measure Angles in Few Taps
Editor's Choice
🔧 Utilities
4.5😐(1K ratings)
FreeAdsIn-App Purchases
Protractor for Angle Measuring screenshot 1
Protractor for Angle Measuring screenshot 2
Protractor for Angle Measuring screenshot 3
Protractor for Angle Measuring screenshot 4

Transform your iPhone into a precision angle measuring tool. Easily measure angles in real-time using touch or camera modes, and even analyze angles in existing photos. Customize your tools for a seamless experience.

What We Love

  • 👍 Useful for surveying and measuring angles
  • 💡 Interesting use of camera to overlay protractor
  • 👍 Helps with specific use cases like golf setup
  • 👍 Provides a clutter-free protractor experience

Room to Improve

  • 🐛 Difficulty using the protractor tool and angle measurement
  • 🐛 Inability to zoom in/out when measuring angles in photos
  • 🐛 Inaccurate angle measurements in some cases
Protractor+#2

Protractor+ by Tue Nguyen Minh

+ Angle Meter & Clinometer
Strong Contender
🔧 Utilities
4.1😞(10K ratings)
FreeIn-App Purchases
Protractor+ screenshot 1
Protractor+ screenshot 2

Transform your device into a versatile angle measurement tool. Easily measure angles in both degrees and radians with an intuitive interface. Ideal for quick and precise angle readings.

What We Love

  • 🚀 Quick angle measurement
  • 👍 Useful for physics labs
  • 👍 Easy to use

Room to Improve

  • 🔒 Degrees feature locked behind paywall
  • 🐛 Unreliable camera feature
  • 🔋 Frequent timeouts force upgrade
Measure#3

Measure by Apple Inc.

Worth Considering
🔧 Utilities
3.1😐(1.6K ratings)
Free
Measure screenshot 1
Measure screenshot 2

Transform your device into a digital tape measure. Quickly gauge the size of real-world objects, determine a person's height, and automatically get dimensions for rectangular items. Save and share your measurements easily.

What We Love

  • 🚀 Quick measurements
  • 👍 Easy to use
  • 🔍 Convenient for quick tasks
  • 💡 Useful level feature

Room to Improve

  • 🐛 Inconsistent accuracy
  • 🤔 Limited functionality
  • 🔍 Struggles with small/tight spaces

More Protractor App apps to explore

4
Protractor Smart
Protractor Smart
Protractor Smart
Measure Every Angle
Free

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.

Camera-based angle measurementTouch measure modePlumb bob measure for slopes
🔧 Utilities
(236)
free with in-app purchases
5
Protractor - Angle Measure
Protractor - Angle Measure
Protractor - Angle Measure
Digital Protractor & Camera
Free

Measure angles precisely using your phone's screen or camera. This intuitive tool allows you to adjust measurement lines and instantly see the angular difference. Ideal for professionals and hobbyists needing quick, accurate angle calculations.

Angle measurement with adjustable linesCamera integration for real-world measurementsFreeze function for static measurements
🔧 Utilities
(11)
ad-supported
6
Protractor (Angle measurement)
Protractor (Angle measurement)
Protractor (Angle measurement)
by Seong Eon Kim
Free

Measure angles of objects using your device's camera. This utility app acts as a digital protractor, allowing you to accurately determine angles in real-world scenarios. Perfect for when a physical protractor is unavailable.

Camera-based angle measurementDigital protractor functionalityMeasure angles of objects
🔧 Utilities
(2)
ad-supported
7
Smart Protractor
Smart Protractor
Smart Protractor
Angle measurement made simple
Free
🔧 Utilities
(0)
8
Angle Gradient Inclinometer
Angle Gradient Inclinometer
Angle Gradient Inclinometer
Angle 360 Degree, Gradient%
Free

Easily measure tilt angles with this free protractor app. It displays inclination from 0 to 359 degrees, along with gradient percentages and angles summing to 180 or 360 degrees. Switch to theodolite mode to set a specified angle to zero.

Measure tilt angles 0-359 degreesDisplay gradient percentageShow sum angles (180/360)
🔧 Utilities
(215)
ad-supported
9
Protractor Tool app
Protractor Tool app
Protractor Tool app
Protractor Tool Angle Meter
Free
🔧 Utilities
(0)
10
Protractor Angle Measure App
Protractor Angle Measure App
Protractor Angle Measure App
Measure Angles Instantly
Free

This tool allows for instant and accurate angle measurements using a digital protractor, camera overlay, and ruler. It supports 180° and 360° measurements, ideal for students, engineers, builders, and DIYers for various projects.

Accurate digital protractor180° & 360° measurementCamera overlay for real-time angles
🔧 Utilities
(2)
free with in-app purchases
11
Protractor Teacher
Protractor Teacher
Protractor Teacher
by Alistair Shaw
$0.99

This geometry app overlays a virtual protractor onto images. Users can rotate and move the protractor to learn how to accurately measure angles in various contexts.

Virtual protractor overlayImage angle measurementProtractor rotation
📚 Education
(2)
paid
12
Angle Meter 360
Angle Meter 360
Angle Meter 360
Convenient angle meter, finder
Free

Measure angles precisely on photos or in real-time using your camera. This user-friendly tool allows for unlimited angle measurements simultaneously, with features like scaling and color adjustment for ease of use.

Angle measurement on picturesReal-time camera angle measurementUnlimited simultaneous angle measurements
🔧 Utilities
(353)
free with in-app purchases
13
Protractor Angle Finder Pro
Protractor Angle Finder Pro
Protractor Angle Finder Pro
No fuss Protractor
Free
🔧 Utilities
(0)
14
Visual Protractor
Visual Protractor
Visual Protractor
by TAKASHI SASAKI
Free
🔧 Utilities
(0)
15
PROtractor – the angle tool for every carpenter, joiner und craftsman
PROtractor – the angle tool for every carpenter, joiner und craftsman
PROtractor – the angle tool for every carpenter, joiner und craftsman
by peAfe GbR
$0.99

Measure angles between surfaces using your iPhone, iPod Touch, or iPad. This tool is designed for professionals in carpentry, joinery, and crafting.

Measure angles between surfacesUtilizes iPhone, iPod Touch, and iPadDesigned for professional use
🔧 Utilities
(1)
paid
16
Protractor (Virtual & Simple)
Protractor (Virtual & Simple)
Protractor (Virtual & Simple)
by Systemiko Inc.
$0.99
🔧 Utilities
(0)
17
Protractor Edge-angle measure
Protractor Edge-angle measure
Protractor Edge-angle measure
The most precise protractor
Free

This utility app functions as a precise digital protractor for measuring angles on your device. It offers a smart instrument for accurate angle measurement, supporting iPhone and iPad. The app is free to download and use.

Precise angle measurementSmart instrumentDigital protractor
🔧 Utilities
(2)
free with in-app purchases
18
Protractor Measuring Angle
Protractor Measuring Angle
Protractor Measuring Angle
Measure, Level Tool & Bubble
Free
🔧 Utilities
(0)
19
My Screen Protractor
My Screen Protractor
My Screen Protractor
by mintaek lee
Free
🔧 Utilities
(0)
20
Angle Meter: Protractor+Level
Angle Meter: Protractor+Level
Angle Meter: Protractor+Level
Measure angles from photos
Free
🔧 Utilities
(0)

Looking for something similar to protractor app?

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FAQ about Protractor App

What is the best protractor app for iPhone?
Protractor for Angle Measuring tops our protractor app ranking as of August 2026, with a 4.5-star average from 1K App Store ratings, and it's free to download.
Yes — 17 of the top protractor app we rank are free to download, including Protractor for Angle Measuring and Protractor+.
Protractor for Angle Measuring shows ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 248+ protractor app on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
This app turns your iPhone into a precision angle measuring tool. It allows you to measure angles in real-time using both touch gestures on the screen and your device's camera. You can also measure angles within photos you've taken.
Key features include a 'Touch Measure' mode where you tap the screen to set angles, a 'Plumb Bob Pendulum' for tilt determination, the ability to measure angles in photos and from the live camera feed, simultaneous measurement of unlimited angles, and tool color customization for better visual organization.

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