# Ship Shapes vs Master

The clearest difference is review sentiment: Master at 100% against Ship Shapes's 0%. Master also leads on price (Free vs $1.99) and rating (5.0 vs 2.0). Ship Shapes's advantage is device support (3 vs 1) and iOS requirement (12.1 vs 17.6). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Master is free to download; Ship Shapes costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Master holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 0% of Ship Shapes's written reviews are positive against 100% of Master's.

Ship Shapes ships an update every 3 weeks, Master fortnightly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ship Shapes | Master |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/ship-shapes/id1451703120/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/master-nav-colregs-iala-tests/id6758554000/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Paid | **Free** |
| Size | 10 MB | 305 MB |
| Requires iOS | **12.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Edmund Broadbent](https://appshunter.io/developer/1440789617) | [Peterjohn Chisholm](https://appshunter.io/developer/1602390398) |

## What reviewers say

### Ship Shapes

[App page](https://appshunter.io/ios/app/ship-shapes/id1451703120)

Learn to recognize and memorize the main day shapes used by boats and ships through an interactive matching game. Score points by correctly matching images to their descriptions. Achieve a score of 50 or more to demonstrate mastery.

**Highlights:** Match images to descriptions, Learn ship day shape signals, Score points for correct answers, Master recognition and memorization, Interactive learning experience

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

**In-app purchases:** none


### Master

[App page](https://appshunter.io/ios/app/master-nav-colregs-iala-tests/id6758554000)

Practice maritime navigation rules and buoyage systems with this app. It helps you identify knowledge gaps and track your progress in mastering essential regulations for mariners.

**Highlights:** USCG Navigation Rules practice, IALA Maritime Buoyage System tests, Knowledge gap identification, Progress tracking, Developed by Master Mariner

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

**In-app purchases:** none


## Frequently asked questions

### Is Ship Shapes free?

Ship Shapes costs $1.99, with no in-app purchases.

### Is Master free?

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

### Which has better reviews, Ship Shapes or Master?

Master is rated higher. Ship Shapes averages 2.0 out of 5 from 1 ratings, while Master averages 5.0 from 1 ratings.

### Do Ship Shapes or Master have ads?

Neither Ship Shapes nor Master shows ads.

### Which is updated more often, Ship Shapes or Master?

Ship Shapes ships an update every 3 weeks, and Master fortnightly. Most recently, Ship Shapes was updated on November 2, 2026 and Master 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.*