# O vs Protractor for Angle Measuring

The clearest difference is rating: Protractor for Angle Measuring at 4.5 against O's 3.2. Protractor for Angle Measuring also leads on review sentiment (48% vs 15%) and ratings volume (1.1K vs 28). O's advantage is in-app purchases (none vs 5) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Protractor for Angle Measuring sells 5 in-app purchases, starting at $0.99 per 7 days. O asks for nothing beyond the download.

Protractor for Angle Measuring holds the better App Store score, 4.5 against 3.2. That said, the two scores are not equally well evidenced: Protractor for Angle Measuring has 1.1K ratings behind it against 28, so its average is the more settled of the two. Written reviews point the same way: 15% of O's written reviews are positive against 48% of Protractor for Angle Measuring's.

O ships an update every 6 weeks, Protractor for Angle Measuring every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | O | Protractor for Angle Measuring |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (28 ratings)](https://appshunter.io/ios/app/o-track/id1555901965/reviews) | **[4.5 (1.1K ratings)](https://appshunter.io/ios/app/protractor-for-angle-measuring/id6474609160/reviews)** |
| Number of ratings | 28 | **1.1K** |
| Positive reviews | 15.4% of reviews | **48.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 26 MB | 120 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Orchid Electronic Technology Co., Ltd.](https://appshunter.io/developer/1299608574) | [AppLiks Sp. z O.O.](https://appshunter.io/developer/1804335622) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-track/id1555901965)

This utility app offers real-time location tracking via Google Maps, including features like geo-fencing, historical track playback, and alarm settings. It also supports work mode configurations for enhanced functionality.

**Highlights:** Real-time Google Maps tracking, Geo-fencing capabilities, Historical track playback, Alarm setting, Work mode configuration

**Features:** macOS Compatibility

**In-app purchases:** none


### Protractor for Angle Measuring

[App page](https://appshunter.io/ios/app/protractor-for-angle-measuring/id6474609160)

Transform your iPhone into a precision angle measurement tool. Effortlessly assess angles in real-time using touch and camera modes, measure multiple angles simultaneously, and customize your tools for accuracy and simplicity. Ideal for quick, reliable on-the-go assessments.

**Highlights:** Real-time angle measurement, Touch and camera modes, Simultaneous measurement of unlimited angles, Plumb bob pendulum for tilt determination, Tool color customization, Measure angles in photos

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $0.99 | per 7 days |
| Weekly Access with Trial | $1.99 | per 7 days |
| Weekly Access | $1.99 | per 7 days |
| Yearly Access | $3.99 | per year |
| Yearly Access | $4.99 | per year |

**What reviewers like**

- 👍 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

**What reviewers complain about**

- 🐛 Difficulty using the protractor tool and angle measurement
- 🐛 Inability to zoom in/out when measuring angles in photos
- 🐛 Inaccurate angle measurements in some cases

**Reported bugs**

- Protractor tool is hard to use and requires multiple tries
- Angle measurements do not match real-world angles

**Requested features**

- Add more instructions and guidance for using the protractor tool
- Improve the zoom functionality when measuring angles in photos
- Enhance the accuracy of angle measurements


## Frequently asked questions

### Is O free?

O is free to download, with no in-app purchases.

### Is Protractor for Angle Measuring free?

Protractor for Angle Measuring is free to download, with in-app purchases available.

### Which has better reviews, O or Protractor for Angle Measuring?

Protractor for Angle Measuring is rated higher. O averages 3.2 out of 5 from 28 ratings, while Protractor for Angle Measuring averages 4.5 from 1.1K ratings.

### Do O or Protractor for Angle Measuring have ads?

Protractor for Angle Measuring shows ads; O does not.

### Which is updated more often, O or Protractor for Angle Measuring?

O ships an update every 6 weeks, and Protractor for Angle Measuring every 3 weeks. Most recently, O was updated on November 3, 2026 and Protractor for Angle Measuring on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*