# Protractor vs Mentora

The clearest difference is ads: Mentora at none against Protractor's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Protractor ships an update every 9 days, Mentora every 2 weeks. The most recent releases landed on October 8, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Protractor | Mentora |
| --- | --- | --- |
| 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 | No |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Ad-supported | — |
| Size | 33 MB | 22 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jens Rieckhof](https://appshunter.io/developer/354266124) | [Adnan Tawaffani](https://appshunter.io/developer/1734327433) |

## 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


### Mentora

[App page](https://appshunter.io/ios/app/mentora/id6752603430)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Protractor free?

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

### Is Mentora free?

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

### Do Protractor or Mentora have ads?

Protractor shows ads; Mentora does not.

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

Protractor ships an update every 9 days, and Mentora every 2 weeks. Most recently, Protractor was updated on October 8, 2026 and Mentora on September 27, 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.*