# Master vs Compass Revision

The clearest difference is price: Compass Revision at Free against Master's $1.99. Master's advantage is in-app purchases (none vs 10). On ads, device support and iOS requirement there is nothing between them.

Compass Revision is free to download; Master costs $1.99 up front. Compass Revision sells 10 one-off in-app purchases. Master asks for nothing beyond the download.

## The numbers

| Metric | Master | Compass Revision |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.8 (100 ratings)](https://appshunter.io/ios/app/master-nav/id1602390396/reviews)** | — |
| Number of ratings | **100** | — |
| Positive reviews | 96.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Paid | — |
| Size | 117 MB | 59 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Peterjohn Chisholm](https://appshunter.io/developer/1602390398) | [Angry Chimp Productions](https://appshunter.io/developer/375447414) |

## What reviewers say

### Master

[App page](https://appshunter.io/ios/app/master-nav/id1602390396)

Learn maritime navigation rules with an interactive system designed for effective retention. This app breaks down complex regulations into manageable sections with visual aids and mnemonics. It revisits incorrect answers and provides instant graphical feedback, making the learning process intuitive and efficient.

**Highlights:** Interactive learning system, Step-by-step rule guidance, Mnemonics and memory aids, Interactive visuals, Graphical feedback on answers, Practice section with progress tracking

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

**In-app purchases:** none


### Compass Revision

[App page](https://appshunter.io/ios/app/compass-revision/id6810254941)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PPR | $12.99 | one-time |
| ROC(M) | $14.99 | one-time |
| NZ Maritime VHF | $17.99 | one-time |
| NZ Day Skipper | $22.99 | one-time |
| Intermediate Cruising | $24.99 | one-time |
| Australian Marine Radio | $24.99 | one-time |
| NZ Boatmaster | $34.99 | one-time |
| Advanced Cruising | $39.99 | one-time |
| Intermediate Coastal Nav | $39.99 | one-time |
| U.S. Coastal Navigation | $59.00 | one-time |


## Frequently asked questions

### Is Master free?

Master costs $1.99, with no in-app purchases.

### Is Compass Revision free?

Compass Revision is free to download, with in-app purchases available.

### Do Master or Compass Revision have ads?

Neither Master nor Compass Revision shows ads.

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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.*