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Protractor+

Protractor+

+ Angle Meter & Clinometer

10K ratings
385 reviews
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • April 11, 2013
  • June 1, 2026

Features

Developer

Tue Nguyen Minh
✨Promote your app ✨
Protractor+ screenshot #1 for iPhone
Protractor+ screenshot #2 for iPhone
🧾$1.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐385
Reviews↘︎
📝40+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦~ in 2 months
Updates frequency↘︎
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About

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.

✓Angle measurement
✓Degrees and radians
✓Intuitive visual control
✓Elegant design
✓Pocket protractor functionality
Show original description

What users say

Summarized from real user reviews of Protractor+. Based on 10K reviews and a 4.1/5 average, it highlights the 3 positives and 4 negatives reviewers mention most about this Utilities app.

Positive things

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

Negative things

  • 🔒Degrees feature locked behind paywall
  • 🐛Unreliable camera feature
  • 🔋Frequent timeouts force upgrade
  • 💰Aggressive monetization tactics
See all reviews

What's New in Protractor+

2.4.5

June 1, 2026

Minor bug fixes

1

In-App Purchases

$1.99

Pro Features

Add camera protractor and more features

User reviews

Most RecentHighest RatedLowest Rated

Was great before update.

This used to work great before the recent update.
Now it will only measure between 80-100, or 100-80.
I can no longer set my telescope tripod to my latitude of 52degrees because of this.

Was going to purchase but will delete instead.
SpiritWolfUKSpiritWolfUK

不好

這個程式一點也不好不能量度
屌你老＊屌你老＊

Protractor

Protractor works right at finding the right angle.
Rancher.Rancher.

TOO LAGGY!!!!!

DID NOT WORK AT ALL
EIOWDFHFEGRUTSGKJHDFEIOWDFHFEGRUTSGKJHDF

Do not recommend

My screen is sideways so it must be the the camera but only in this app please help me find a better app so my homework is possible when I try fixing it it goes the wrong way help
Pratcliff1Pratcliff1
See 380 more reviews

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User experience

🐞

Reported Bugs

3 issues

Camera feature not working as expected

Bug

Angle measurements not accurate

Bug

Frequent app crashes

Bug
✨

Requested Features

3 requests

Ability to measure in degrees without upgrade

Feature

Improved accuracy and responsiveness

Feature

Removal of timeouts and paywalls

Feature

FAQ

What does this app do?

This application turns your iPhone into a pocket protractor for measuring angles. It allows you to quickly and easily determine angles in both degrees and radians.

What are the key features?

Key features include the ability to measure angles in both degrees and radians, an intuitive visual control for easy use, and an elegant design for a pleasant user experience.

Is this app free to use?

The app is free to download and use, with the option for in-app purchases. This allows users to access additional features or unlock the full functionality.

What devices is this app compatible with?

The app is designed for iPhone devices. Specific iOS version compatibility is typically detailed in the app store listing.

What are common use cases for this app?

Common use cases include DIY projects, woodworking, construction, educational purposes, or any situation where precise angle measurement is needed quickly and conveniently.