# Maritime Master vs IRPCS

The clearest difference is in-app purchases: Maritime Master at none against IRPCS's 2. Maritime Master also leads on ads (none vs shown). IRPCS's advantage is update cadence (every 3 days vs every 6 weeks) and iOS requirement (15.1 vs 17.6). On price and device support there is nothing between them.

Both are free to download. IRPCS sells 2 in-app purchases, starting at $4.99 per month. Maritime Master asks for nothing beyond the download.

Maritime Master ships an update every 6 weeks, IRPCS every 3 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | Maritime Master | IRPCS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/maritime-master-skipper/id6749545029/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | Free | — |
| Size | 10 MB | 73 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [MARITIME MASTER LIMITED](https://appshunter.io/developer/1107589346) | [Paul Whittle](https://appshunter.io/developer/1076749256) |

## What reviewers say

### Maritime Master

[App page](https://appshunter.io/ios/app/maritime-master-skipper/id6749545029)

Learn seamanship and small-craft navigation with interactive diagrams and calculators. Practice plotting positions, understanding tides, and mastering navigation techniques. Includes a reference library for essential maritime knowledge.

**Highlights:** Interactive diagrams and calculators, Dead reckoning and estimated position plotting, Tidal height and stream visualization, Position fixing and compass error modules, COLREGs, VHF, and meteorology reference, Speed-time-distance and unit conversion calculators

**Features:** macOS Compatibility

**In-app purchases:** none


### IRPCS

[App page](https://appshunter.io/ios/app/irpcs/id6762519800)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IRPCS Pro 1 month | $4.99 | per month |
| IRPCS Pro | $29.99 | per year |


## Frequently asked questions

### Is Maritime Master free?

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

### Is IRPCS free?

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

### Do Maritime Master or IRPCS have ads?

IRPCS shows ads; Maritime Master does not.

### Which is updated more often, Maritime Master or IRPCS?

Maritime Master ships an update every 6 weeks, and IRPCS every 3 days. Most recently, Maritime Master was updated on November 5, 2026 and IRPCS on November 5, 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.*