# Protractor+ vs Protractor Smart

The clearest difference is rating: Protractor Smart at 4.6 against Protractor+'s 4.1. Protractor Smart also leads on review sentiment (40% vs 15%) and iOS requirement (14.0 vs 17.6). Protractor+'s advantage is update cadence (every 2 months vs every 21 months) and ratings volume (10K vs 242). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Protractor+ sells 1 one-off in-app purchase and Protractor Smart sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Protractor Smart holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: Protractor+ has 10K ratings behind it against 242, so its average is the more settled of the two. Written reviews point the same way: 15% of Protractor+'s written reviews are positive against 40% of Protractor Smart's.

Protractor+ ships an update every 2 months, Protractor Smart every 21 months. Both last shipped on September 22, 2026.

## The numbers

| Metric | Protractor+ | Protractor Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (10K ratings)](https://appshunter.io/ios/app/protractor-plus/id631311541/reviews) | **[4.6 (242 ratings)](https://appshunter.io/ios/app/protractor-smart/id1076530001/reviews)** |
| Number of ratings | **10K** | 242 |
| Positive reviews | 14.9% of reviews | **40.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 21 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 21 MB | 11 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tue Nguyen Minh](https://appshunter.io/developer/434811167) | [ExaMobile S.A.](https://appshunter.io/developer/506014841) |

## What reviewers say

### Protractor+

[App page](https://appshunter.io/ios/app/protractor-plus/id631311541)

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.

**Highlights:** Angle measurement, Degrees and radians, Intuitive visual control, Elegant design, Pocket protractor functionality

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Features | $1.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

- 🔒 Degrees feature locked behind paywall
- 🐛 Unreliable camera feature
- 🔋 Frequent timeouts force upgrade
- 💰 Aggressive monetization tactics

**Reported bugs**

- Camera feature not working as expected
- Angle measurements not accurate
- Frequent app crashes

**Requested features**

- Ability to measure in degrees without upgrade
- Improved accuracy and responsiveness
- Removal of timeouts and paywalls


### Protractor Smart

[App page](https://appshunter.io/ios/app/protractor-smart/id1076530001)

This app acts as a smart instrument for measuring angles using your device's camera. It offers two free modes for measuring angles on screen or using a plumb bob for slopes, with an additional premium mode for polygon measurements.

**Highlights:** Camera-based angle measurement, Touch measure mode, Plumb bob measure for slopes, Polygon measurement (premium), Screenshot functionality

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AdBlock - Remove ads | $1.99 | one-time |


## Frequently asked questions

### Is Protractor+ free?

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

### Is Protractor Smart free?

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

### Which has better reviews, Protractor+ or Protractor Smart?

Protractor Smart is rated higher. Protractor+ averages 4.1 out of 5 from 10K ratings, while Protractor Smart averages 4.6 from 242 ratings.

### Do Protractor+ or Protractor Smart have ads?

Neither Protractor+ nor Protractor Smart shows ads.

### Which is updated more often, Protractor+ or Protractor Smart?

Protractor+ ships an update every 2 months, and Protractor Smart every 21 months. Most recently, Protractor+ was updated on September 22, 2026 and Protractor Smart on September 22, 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.*