# Protractor Smart vs Smart Protractor

The clearest difference is update cadence: Smart Protractor at every 2 weeks against Protractor Smart's every 21 months. Protractor Smart's advantage is iOS requirement (14.0 vs 17.2). On price, ads, in-app purchases and device support there is nothing between them.

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

Protractor Smart ships an update every 21 months, Smart Protractor every 2 weeks. The most recent releases landed on September 22, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Protractor Smart | Smart Protractor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (242 ratings)](https://appshunter.io/ios/app/protractor-smart/id1076530001/reviews)** | — |
| Number of ratings | **242** | — |
| Positive reviews | 40.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 8 MB |
| Requires iOS | **14.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## 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 |


### 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 Smart free?

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

### Is Smart Protractor free?

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

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

Neither Protractor Smart nor Smart Protractor shows ads.

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

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