# Protractor (Angle measurement) vs Smart Protractor

The clearest difference is in-app purchases: Protractor (Angle measurement) at none against Smart Protractor's 2. Protractor (Angle measurement) also leads on iOS requirement (13.0 vs 17.2). Smart Protractor's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. Smart Protractor sells 1 one-off in-app purchase. Protractor (Angle measurement) asks for nothing beyond the download.

Protractor (Angle measurement) ships an update every 5 weeks, Smart Protractor every 2 weeks. The most recent releases landed on October 1, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Protractor (Angle measurement) | Smart Protractor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (5 ratings)](https://appshunter.io/ios/app/protractor-angle-measurement/id926663865/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 68.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Ad-supported | — |
| Size | 7 MB | 8 MB |
| Requires iOS | **13.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [EONSOFT](https://appshunter.io/developer/899851112) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## 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


### Smart Protractor

[App page](https://appshunter.io/ios/app/smart-protractor/id6746047543)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Protractor (Angle measurement) free?

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

### Is Smart Protractor free?

Smart Protractor is free to download, with in-app purchases available.

### Do Protractor (Angle measurement) or Smart Protractor have ads?

Protractor (Angle measurement) shows ads; Smart Protractor does not.

### Which is updated more often, Protractor (Angle measurement) or Smart Protractor?

Protractor (Angle measurement) ships an update every 5 weeks, and Smart Protractor every 2 weeks. Most recently, Protractor (Angle measurement) was updated on October 1, 2026 and Smart Protractor on September 11, 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.*