Best Rule Angle Apps & Games

94+ iOS apps & games curated and reviewed

3.9 avg rating

19 free apps & games

Updated October 2026

Measure Toolbox is the household name in rule angle, but it's far from the only option. We track 94+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Rule Angle Apps & Games (October 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Measure Toolbox-Tape rule	Free	—	Yes	No	May 2026
2	Math Angle	Free	—	No	No	May 2026
3	Angle Master	Free	—	No	No	May 2026
4	Smart Protractor & Angle Meter	Free	—	No	Yes	Sep 2026
5	Angleous for iPhone as angle calculator	Free	1.8★ (5)	No	No	May 2026
6	Digital Slide Rule	Free	5.0★ (14)	No	No	May 2026
7	Angle Finder: Protractor	Free	5.0★ (1)	Yes	Yes	Sep 2026
8	Protractor: Angle Finder	Free	—	No	Yes	Oct 2026

Top Picks for Rule Angle

#1

Measure Toolbox-Tape rule by ShenZhen City XueQin Information Technology Inc.

decibel ruler Angle distance

Editor's Choice

0.0(0 ratings)

FreeAds

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Measure Toolbox-Tape rule screenshot 5

#2

Math Angle by Heiko Etzold

Strong Contender

0.0(0 ratings)

Free

Math Angle screenshot 1

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Math Angle screenshot 4

Learn about angles in mathematics. Explore different angle types, practice estimation, and identify special angles. This app offers interactive tools for visual learning.

#3

Angle Master by Chelsea Farley

Level up your angle skills!

Worth Considering

0.0(0 ratings)

Free

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More Rule Angle apps to explore

Smart Protractor & Angle Meter

Smart Protractor & Angle Meter

Smart Protractor & Angle Meter

Camera, Photo, Polygon & Level

Angleous for iPhone as angle calculator

Angleous for iPhone as angle calculator

Angleous for iPhone as angle calculator

by Hossam Hamouda

This app uses your device's camera to calculate angles of polygons in real-time. Simply point your camera at a shape, and it will display the angles on screen. You can then screenshot these calculations for saving.

Real-time angle calculationUses device cameraPolygon angle detection

Digital Slide Rule

Digital Slide Rule

Digital Slide Rule

This app digitally recreates various types of slide rules, offering features not possible on physical models like color options and numeric displays. It includes a slideshow of famous slide rules and is best experienced on larger devices.

Simulates straight, circular, spiral, and cylindrical slide rulesDozens of scales includedColor options and numeric value displays

Angle Finder: Protractor

Angle Finder: Protractor

Angle Finder: Protractor

Measure Photos & Camera

Measure angles directly on your device using your camera or photos. This tool offers a digital protractor and the ability to place points on images to calculate angles. Results can be saved or shared as PNG screenshots.

Measure angles with three draggable pointsDigital screen protractorMeasure angles over photos

Protractor: Angle Finder

Protractor: Angle Finder

Protractor: Angle Finder

Camera Level, Slope Meter

Mitre - Precision Angle

Mitre - Precision Angle

Mitre - Precision Angle

Angles for General Purpose

Ruler, Altimeter and More

This utility app provides a portable ruler for on-the-go measurements. It also includes a suite of additional tools like a protractor, spirit level, and various meters for diverse measurement needs.

Portable rulerProtractorSpirit level

free with in-app purchases

Angle Gradient Inclinometer

Angle Gradient Inclinometer

Angle Gradient Inclinometer

Angle 360 Degree, Gradient%

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)

📊 Productivity

Protractor (Angle measurement)

Protractor (Angle measurement)

Protractor (Angle measurement)

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

Angle Finder 78

Angle Finder 78

Angle Finder 78

This educational application assists students in calculating heights by determining angles above the horizontal. It simplifies complex measurements for inaccessible areas.

Calculate angles above horizontalDetermine inaccessible heightsEducational tool for students

70 Degree : Smart Protractor

70 Degree : Smart Protractor

70 Degree : Smart Protractor

Creative Angle Measurement

This utility app helps you measure angles with your iPhone. It provides notifications when a target angle is reached, with options for visual and auditory alerts.

Angle degree measurementCustomizable angle alertsVisual strobe notifications

How Good is your Geometry?

Test your geometry knowledge by accurately guessing angles on screen. This game offers a sleek design, multiple difficulty levels, and engaging game modes to challenge your spatial reasoning skills.

Guess angles accuratelyDistinguish angle typesSleek and modern design

free with in-app purchases

by Golf Rules AI, Inc.

Trigonometry Help Lite

Trigonometry Help Lite

Trigonometry Help Lite

Triangle Calculator + Workings

This app quickly calculates unknown angles and sides of right-angled triangles. It offers a workings view for detailed solutions, scale drawings, and a formula reference. Input angles in various formats and customize decimal precision.

Solve right-angled trianglesView detailed math workingsScale drawing of solved triangle

free with in-app purchases

Angle Protractor Finder Tool

Angle Protractor Finder Tool

Angle Protractor Finder Tool

Smart clinometer & calculator

by domesticusdevelop

Protractor Edge-angle measure

Protractor Edge-angle measure

Protractor Edge-angle measure

The most precise protractor

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

free with in-app purchases

FAQ about Rule Angle

Are there free rule angle apps & games for iPhone?

Yes — 19 of the top rule angle apps & games we rank are free to download, including Measure Toolbox-Tape rule and Math Angle.

Does Measure Toolbox-Tape rule have ads or in-app purchases?

Measure Toolbox-Tape rule shows ads and has no in-app purchases, according to its App Store listing as of October 2026.

How many rule angle apps & games are on the App Store?

We track 94+ rule angle apps & games on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.