# Seabook Maritime vs MD

The clearest difference is price: Seabook Maritime at Free against MD's $4.99. Seabook Maritime also leads on iOS requirement (13.0 vs 15.1). MD's advantage is update cadence (every 2 months vs every 16 months). On ads, in-app purchases and device support there is nothing between them.

Seabook Maritime is free to download; MD costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Seabook Maritime ships an update every 16 months, MD every 2 months. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Seabook Maritime | MD |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.5 (19 ratings)](https://appshunter.io/ios/app/seabook-maritime/id708215141/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 79.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 36 MB | 34 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ozgur GUNES](https://appshunter.io/developer/708215144) | [satoshi yoshida](https://appshunter.io/developer/1873856165) |

## What reviewers say

### Seabook Maritime

[App page](https://appshunter.io/ios/app/seabook-maritime/id708215141)

This app provides essential maritime information for seafarers and shore-based professionals. It serves as an offline reference for ship stability, navigation, regulations, and marine engineering, aiding in safer seas and cleaner waters.

**Highlights:** COLREG regulations, GMDSS information, Marine engineering details, Navigation at sea, Ship stability calculations, Shipboard safety guidelines

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

**In-app purchases:** none


### MD

[App page](https://appshunter.io/ios/app/md-102-endpoint-admin-prep/id6777882835)

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

**In-app purchases:** none


## Frequently asked questions

### Is Seabook Maritime free?

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

### Is MD free?

MD costs $4.99, with no in-app purchases.

### Do Seabook Maritime or MD have ads?

Neither Seabook Maritime nor MD shows ads.

### Which is updated more often, Seabook Maritime or MD?

Seabook Maritime ships an update every 16 months, and MD every 2 months. Most recently, Seabook Maritime was updated on October 23, 2026 and MD on October 25, 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.*