# Master vs AMC Buoyage System (IALA)

The clearest difference is update cadence: Master at fortnightly against AMC Buoyage System (IALA)'s every 2 months. AMC Buoyage System (IALA)'s advantage is price ($0.99 vs $1.99) and iOS requirement (13.0 vs 15.0). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Master costs $1.99 and AMC Buoyage System (IALA) $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Master ships an update fortnightly, AMC Buoyage System (IALA) every 2 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | Master | AMC Buoyage System (IALA) |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | **[4.8 (100 ratings)](https://appshunter.io/ios/app/master-nav/id1602390396/reviews)** | — |
| Number of ratings | **100** | — |
| Positive reviews | 96.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Paid | Paid |
| Size | 117 MB | 130 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Peterjohn Chisholm](https://appshunter.io/developer/1602390398) | [AMC Search Ltd](https://appshunter.io/developer/1640174244) |

## 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


### AMC Buoyage System (IALA)

[App page](https://appshunter.io/ios/app/amc-buoyage-system-iala/id1640182521)

Learn the meaning of maritime buoyage markers with 3D visualizations. Understand buoy types, colors, shapes, and lighting sequences for safe navigation at sea. Covers both IALA Region A and B.

**Highlights:** 3D buoy visualizations, Buoy color, shape, and lighting details, IALA Region A and B support, Night-time lighting sequences, Suitable for beginners and experienced mariners

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

**In-app purchases:** none


## Frequently asked questions

### Is Master free?

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

### Is AMC Buoyage System (IALA) free?

AMC Buoyage System (IALA) costs $0.99, with no in-app purchases.

### Do Master or AMC Buoyage System (IALA) have ads?

Neither Master nor AMC Buoyage System (IALA) shows ads.

### Which is updated more often, Master or AMC Buoyage System (IALA)?

Master ships an update fortnightly, and AMC Buoyage System (IALA) every 2 months. Most recently, Master was updated on October 27, 2026 and AMC Buoyage System (IALA) on October 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.*