# Protractor vs Smart Protractor

The clearest difference is in-app purchases: Protractor at none against Smart Protractor's 2. Smart Protractor's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

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

Protractor ships an update every 9 days, Smart Protractor every 2 weeks. The most recent releases landed on September 21, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Protractor | Smart Protractor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (14 ratings)](https://appshunter.io/ios/app/protractor-angle-measure/id6630392312/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Ad-supported | — |
| Size | 33 MB | 8 MB |
| Requires iOS | **16.6** | 17.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jens Rieckhof](https://appshunter.io/developer/354266124) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## What reviewers say

### 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


### 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 free?

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 Protractor or Smart Protractor have ads?

Protractor shows ads; Smart Protractor does not.

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

Protractor ships an update every 9 days, and Smart Protractor every 2 weeks. Most recently, Protractor was updated on September 21, 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.*