# One North vs Protractor°

The clearest difference is in-app purchases: One North at none against Protractor°'s 1. One North also leads on iOS requirement (15.1 vs 26.0). Protractor°'s advantage is update cadence (every 2 days vs every 5 weeks). On price, ads and device support there is nothing between them.

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

One North ships an update every 5 weeks, Protractor° every 2 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | One North | Protractor° |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/protractor-angle-finder/id6822147049/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | — | Free |
| Size | 36 MB | 13 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Chimeric Technologies Pte. Ltd.](https://appshunter.io/developer/1508526453) | [Just2us Pte Ltd](https://appshunter.io/developer/293971188) |

## What reviewers say

### One North

[App page](https://appshunter.io/ios/app/one-north/id1536736740)

**In-app purchases:** none


### Protractor°

[App page](https://appshunter.io/ios/app/protractor-angle-finder/id6822147049)

This app transforms your iPhone Duo into a digital protractor. Measure angles on paper or between surfaces by simply folding the device to match the desired angle and reading the degrees. Save and organize your measurements for later use.

**Highlights:** Measure angles on paper, Measure angles between surfaces, Uses iPhone Duo's folding hinge, Record and save angle readings, Organize measurements by date

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Protractor Lifetime Access | $3.99 | one-time |


## Frequently asked questions

### Is One North free?

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

### Is Protractor° free?

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

### Do One North or Protractor° have ads?

Neither One North nor Protractor° shows ads.

### Which is updated more often, One North or Protractor°?

One North ships an update every 5 weeks, and Protractor° every 2 days. Most recently, One North was updated on November 7, 2026 and Protractor° on October 31, 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.*