# Protractor Smart vs Protractor

The clearest difference is rating: Protractor Smart at 4.6 against Protractor's 1.8. Protractor Smart also leads on ratings volume (242 vs 6) and iOS requirement (14.0 vs 16.0). Protractor's advantage is update cadence (every 5 weeks vs every 21 months) and review sentiment (64% vs 40%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Protractor Smart sells 1 one-off in-app purchase and Protractor sells 6 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Protractor Smart holds the better App Store score, 4.6 against 1.8. That said, the two scores are not equally well evidenced: Protractor Smart has 242 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 40% of Protractor Smart's written reviews are positive against 64% 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 5 weeks. The most recent releases landed on September 22, 2026 and August 29, 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)** | [1.8 (6 ratings)](https://appshunter.io/ios/app/protractor-measure-angles/id1601838509/reviews) |
| Number of ratings | **242** | 6 |
| Positive reviews | 40.4% of reviews | **63.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 11 MB | 5 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [Noadit, Inc.](https://appshunter.io/developer/1516754355) |

## 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-measure-angles/id1601838509)

Measure angles precisely using your phone's screen, gyroscope, or camera. Offers smart presets, real-time feedback with high accuracy, and calibration features to adapt to various situations.

**Highlights:** 3-in-1 measurement modes, Smart angle presets with alerts, Hyper-responsive feedback (≤0.5° accuracy), Auto dynamic compensation calibration, Anti-shake technology for motion scenes, Screen lock for measurements

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP | $4.99 | per month |
| Bubble Tea | $0.99 | one-time |
| Sponsor | $4.99 | one-time |
| Coffee | $4.99 | one-time |
| Sponsor | $19.99 | one-time |
| Sponsor | $99.99 | one-time |


## 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 in-app purchases available.

### 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 1.8 from 6 ratings.

### Do Protractor Smart or Protractor have ads?

Neither Protractor Smart nor Protractor shows ads.

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

Protractor Smart ships an update every 21 months, and Protractor every 5 weeks. Most recently, Protractor Smart was updated on September 22, 2026 and Protractor on August 29, 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.*