# Trig Instruments Toolbox vs Protractor for Angle Measuring

The clearest difference is rating: Protractor for Angle Measuring at 4.5 against Trig Instruments Toolbox's 2.6. Protractor for Angle Measuring also leads on update cadence (every 2 weeks vs every 27 months) and ratings volume (1K vs 5). Trig Instruments Toolbox's advantage is in-app purchases (none vs 5) and ads (none vs shown). On price, review sentiment, device support and iOS requirement 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. Trig Instruments Toolbox asks for nothing beyond the download.

Protractor for Angle Measuring holds the better App Store score, 4.5 against 2.6. That said, the two scores are not equally well evidenced: Protractor for Angle Measuring has 1K ratings behind it against 5, so its average is the more settled of the two. Written reviews split almost evenly too, at 50% and 49% positive.

Trig Instruments Toolbox ships an update every 27 months, Protractor for Angle Measuring every 2 weeks. The most recent releases landed on October 7, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Trig Instruments Toolbox | Protractor for Angle Measuring |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (5 ratings)](https://appshunter.io/ios/app/trig-instruments-toolbox/id1467103926/reviews) | **[4.5 (1K ratings)](https://appshunter.io/ios/app/protractor-for-angle-measuring/id6474609160/reviews)** |
| Number of ratings | 5 | **1K** |
| Positive reviews | **50.0% of reviews** | 49.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 27 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 54 MB | 112 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stevens Marketing Limited](https://appshunter.io/developer/1467103925) | [AppLiks Sp. z O.O.](https://appshunter.io/developer/1804335622) |

## What reviewers say

### Trig Instruments Toolbox

[App page](https://appshunter.io/ios/app/trig-instruments-toolbox/id1467103926)

This utility app provides a collection of essential field tools, including a ratio to angle converter, inclinometer, tally counter, and protractor. It leverages your device's sensors for accurate estimations and calculations, reducing the need to carry multiple physical instruments.

**Highlights:** Ratio to Angle converter, Inclinometer, Tally counter, Protractor, Uses device sensors for accuracy, New free tools added regularly

**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 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.

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

**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 Trig Instruments Toolbox free?

Trig Instruments Toolbox 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, Trig Instruments Toolbox or Protractor for Angle Measuring?

Protractor for Angle Measuring is rated higher. Trig Instruments Toolbox averages 2.6 out of 5 from 5 ratings, while Protractor for Angle Measuring averages 4.5 from 1K ratings.

### Do Trig Instruments Toolbox or Protractor for Angle Measuring have ads?

Protractor for Angle Measuring shows ads; Trig Instruments Toolbox does not.

### Which is updated more often, Trig Instruments Toolbox or Protractor for Angle Measuring?

Trig Instruments Toolbox ships an update every 27 months, and Protractor for Angle Measuring every 2 weeks. Most recently, Trig Instruments Toolbox was updated on October 7, 2026 and Protractor for Angle Measuring on October 20, 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.*