# METACENTRIC vs Maritime Master

The clearest difference is price: Maritime Master at Free against METACENTRIC's $5.99. Maritime Master also leads on update cadence (daily vs every 5 days). METACENTRIC's advantage is in-app purchases (none vs 1) and iOS requirement (15.2 vs 17.6). On ads and device support there is nothing between them.

Maritime Master is free to download; METACENTRIC costs $5.99 up front. Maritime Master sells 1 one-off in-app purchase. METACENTRIC asks for nothing beyond the download.

METACENTRIC ships an update every 5 days, Maritime Master daily. Both last shipped on October 19, 2026.

## The numbers

| Metric | METACENTRIC | Maritime Master |
| --- | --- | --- |
| Price | $5.99 | **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 5 days | **Daily** |
| Monetization | — | Free |
| Size | 1 MB | 7 MB |
| Requires iOS | **15.2** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 9+ |
| Developer | [Oleksii Nezhalskyi](https://appshunter.io/developer/1687730603) | [MARITIME MASTER LIMITED](https://appshunter.io/developer/1107589346) |

## What reviewers say

### METACENTRIC

[App page](https://appshunter.io/ios/app/metacentric/id6450050587)

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

**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 METACENTRIC free?

METACENTRIC costs $5.99, with no in-app purchases.

### Is Maritime Master free?

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

### Do METACENTRIC or Maritime Master have ads?

Neither METACENTRIC nor Maritime Master shows ads.

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

METACENTRIC ships an update every 5 days, and Maritime Master daily. Most recently, METACENTRIC was updated on October 19, 2026 and Maritime Master on October 19, 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.*