# Protractor (Angle measurement) vs Trig Instruments Toolbox

The clearest difference is rating: Protractor (Angle measurement) at 3.6 against Trig Instruments Toolbox's 2.6. Protractor (Angle measurement) also leads on update cadence (every 5 weeks vs every 27 months) and review sentiment (68% vs 50%). Trig Instruments Toolbox's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, ratings volume, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Protractor (Angle measurement) holds the better App Store score, 3.6 against 2.6. Both are backed by a comparable volume of ratings — 10 and 5 respectively. Written reviews point the same way: 68% of Protractor (Angle measurement)'s written reviews are positive against 50% of Trig Instruments Toolbox's.

Protractor (Angle measurement) ships an update every 5 weeks, Trig Instruments Toolbox every 27 months. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Protractor (Angle measurement) | Trig Instruments Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (10 ratings)](https://appshunter.io/ios/app/protractor-angle-measurement/id926663865/reviews)** | [2.6 (5 ratings)](https://appshunter.io/ios/app/trig-instruments-toolbox/id1467103926/reviews) |
| Number of ratings | **10** | 5 |
| Positive reviews | **68.1% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 27 months |
| Monetization | Ad-supported | **Free** |
| Size | 7 MB | 54 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EONSOFT](https://appshunter.io/developer/899851112) | [Stevens Marketing Limited](https://appshunter.io/developer/1467103925) |

## What reviewers say

### Protractor (Angle measurement)

[App page](https://appshunter.io/ios/app/protractor-angle-measurement/id926663865)

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.

**Highlights:** Camera-based angle measurement, Digital protractor functionality, Measure angles of objects, Real-world angle determination

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Free and functional
- 👍 Accurate measurements
- 👍 Useful for homework
- 👍 Handy when needed
- 👍 Better than others

**What reviewers complain about**

- 👎 Hard to hold steady
- 👎 Camera is blurry
- 👎 Ads can be intrusive
- 👎 Difficult to use on paper
- 👎 Time limit on free version

**Reported bugs**

- Camera is always blurry
- Ads cover buttons
- App is a ghost app, cannot open
- Time limit makes it unusable
- Measures only in radians (free)

**Requested features**

- Ability to freeze image
- Ability to use photos for measurement
- Upload a still image and overlay protractor
- Improve accuracy with shaky hands
- Add option to take a picture and measure


### 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


## Frequently asked questions

### Is Protractor (Angle measurement) free?

Protractor (Angle measurement) is free to download, with no in-app purchases.

### Is Trig Instruments Toolbox free?

Trig Instruments Toolbox is free to download, with no in-app purchases.

### Which has better reviews, Protractor (Angle measurement) or Trig Instruments Toolbox?

Protractor (Angle measurement) is rated higher. Protractor (Angle measurement) averages 3.6 out of 5 from 10 ratings, while Trig Instruments Toolbox averages 2.6 from 5 ratings.

### Do Protractor (Angle measurement) or Trig Instruments Toolbox have ads?

Protractor (Angle measurement) shows ads; Trig Instruments Toolbox does not.

### Which is updated more often, Protractor (Angle measurement) or Trig Instruments Toolbox?

Protractor (Angle measurement) ships an update every 5 weeks, and Trig Instruments Toolbox every 27 months. Most recently, Protractor (Angle measurement) was updated on October 18, 2026 and Trig Instruments Toolbox on October 7, 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.*