# Protractor Smart vs Protractor

The clearest difference is rating: Protractor Smart at 4.6 against Protractor's 3.9. Protractor Smart also leads on ads (none vs shown) and ratings volume (242 vs 14). Protractor's advantage is in-app purchases (none vs 1) and update cadence (every 9 days vs every 21 months). On price and device support there is nothing between them.

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

Protractor Smart holds the better App Store score, 4.6 against 3.9. That said, the two scores are not equally well evidenced: Protractor Smart has 242 ratings behind it against 14, so its average is the more settled of the two. Written reviews complicate that: 40% of Protractor Smart's written reviews are positive against 60% of Protractor's, so the app with the better star average is not the one people write more warmly about.

Protractor Smart ships an update every 21 months, Protractor every 9 days. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Protractor Smart | Protractor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (242 ratings)](https://appshunter.io/ios/app/protractor-smart/id1076530001/reviews)** | [3.9 (14 ratings)](https://appshunter.io/ios/app/protractor-angle-measure/id6630392312/reviews) |
| Number of ratings | **242** | 14 |
| Positive reviews | 40.4% of reviews | **60.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Every 9 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 11 MB | 33 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [Jens Rieckhof](https://appshunter.io/developer/354266124) |

## What reviewers say

### 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 |


### Protractor

[App page](https://appshunter.io/ios/app/protractor-angle-measure/id6630392312)

Measure angles precisely using your phone's screen or camera. This intuitive tool allows you to adjust measurement lines and instantly see the angular difference. Ideal for professionals and hobbyists needing quick, accurate angle calculations.

**Highlights:** Angle measurement with adjustable lines, Camera integration for real-world measurements, Freeze function for static measurements, Clean and modern user interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Protractor Smart free?

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

### Is Protractor free?

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

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

Protractor Smart is rated higher. Protractor Smart averages 4.6 out of 5 from 242 ratings, while Protractor averages 3.9 from 14 ratings.

### Do Protractor Smart or Protractor have ads?

Protractor shows ads; Protractor Smart does not.

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

Protractor Smart ships an update every 21 months, and Protractor every 9 days. Most recently, Protractor Smart was updated on September 22, 2026 and Protractor on September 21, 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.*