# Photo Protractor vs Smart Protractor

The clearest difference is in-app purchases: Photo Protractor at none against Smart Protractor's 2. Photo Protractor also leads on iOS requirement (8.0 vs 17.2). Smart Protractor's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads and device support there is nothing between them.

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

Photo Protractor ships an update every 2 months, Smart Protractor every 2 weeks. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Photo Protractor | Smart Protractor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (39 ratings)](https://appshunter.io/ios/app/photo-protractor/id705832869/reviews)** | — |
| Number of ratings | **39** | — |
| Positive reviews | 79.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 11 MB | 8 MB |
| Requires iOS | **8.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mayumi Kato](https://appshunter.io/developer/705832872) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## What reviewers say

### Photo Protractor

[App page](https://appshunter.io/ios/app/photo-protractor/id705832869)

This app functions as a digital protractor, allowing users to measure angles and radians directly from photos. Simply take a picture, position the measurement area, and adjust the lines to get precise readings. It's an easy-to-use tool for quick angle calculations.

**Highlights:** Measure angles from photos, Display angles and radians, Adjustable measurement lines, Easy-to-use interface, Take pictures for measurement

**In-app purchases:** none


### 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 Photo Protractor free?

Photo Protractor 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 Photo Protractor or Smart Protractor have ads?

Neither Photo Protractor nor Smart Protractor shows ads.

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

Photo Protractor ships an update every 2 months, and Smart Protractor every 2 weeks. Most recently, Photo Protractor was updated on October 16, 2026 and Smart Protractor on October 12, 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.*