# MAR vs Maritime Master

The clearest difference is in-app purchases: MAR at none against Maritime Master's 1. MAR also leads on iOS requirement (11.0 vs 17.6). Maritime Master's advantage is update cadence (daily vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. Maritime Master sells 1 one-off in-app purchase. MAR asks for nothing beyond the download.

MAR ships an update every 9 months, Maritime Master daily. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | MAR | Maritime Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/maritime-master-calcdeck/id6760967809/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Daily** |
| Monetization | — | Free |
| Size | 15 MB | 7 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [AG�NCIA EUROPEIA DE SEGURAN�A MAR�TIMA.](https://appshunter.io/developer/1057632331) | [MARITIME MASTER LIMITED](https://appshunter.io/developer/1107589346) |

## What reviewers say

### MAR

[App page](https://appshunter.io/ios/app/mar-cis/id1234942090)

**Features:** macOS Compatibility

**In-app purchases:** none


### Maritime Master

[App page](https://appshunter.io/ios/app/maritime-master-calcdeck/id6760967809)

This app provides a comprehensive suite of 88 professional maritime calculators for navigation, celestial observation, tides, stability, weather, engineering, and more. It's designed for maritime professionals and enthusiasts, offering offline functionality and citing all formulas with their official sources.

**Highlights:** 88 professional maritime calculators, Offline functionality, Navigation calculations, Celestial observation tools, Stability and cargo calculations, Unit converters

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalcDeck Pro | $14.99 | one-time |


## Frequently asked questions

### Is MAR free?

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

### Is Maritime Master free?

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

### Do MAR or Maritime Master have ads?

Neither MAR nor Maritime Master shows ads.

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

MAR ships an update every 9 months, and Maritime Master daily. Most recently, MAR was updated on September 18, 2026 and Maritime Master on September 23, 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.*