# Seabook Maritime — The Leading #1 Maritime App

> Offline maritime reference for seafarers covering navigation, engineering, and safety. (iPhone/iPad app by Ozgur GUNES.)

- Source: https://appshunter.io/ios/app/seabook-maritime/id708215141 (this page in markdown: same URL + `.md`)
- Developer: [Ozgur GUNES](https://appshunter.io/developer/708215144)
- Category: Education, Books
- Price: Free
- Rating: 4.50/5 from 19 App Store ratings · 43 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 36 MB
- Languages: American English
- Released: 2013-10-25
- Data updated: 2026-08-21
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/seabook-maritime/id708215141/reviews.md

## What is Seabook Maritime?

Seabook serves as a key information source for seafarers and shore-based employees to promote safer seas and cleaner waters. This easy-to-use, accessible-offline mobile app serves as a reference tool for key elements of Ship stability, Navigation, COLREG and Marine engineering, and is designed for seafarers, cadets, maritime students and master mariners alike.

Seabook contains details on;

1) COLREG (International Regulations for Preventing Collisions at Sea)
2) GMDSS (Global Maritime Distress and Safety System)
3) International Code of Signals
4) Marine Engineering
5) Marine Meteorology
6) Shipboard Safety
7) Health at Sea
8) Life Saving Appliances
9) Shipmanagement and Business
10) Navigation at Sea
11) Ship Stability
12) Country Flags
13) Ropework
14) Knots
15) more and more enriched contents ...

## Key features

- COLREG regulations
- GMDSS information
- Marine engineering details
- Navigation at sea
- Ship stability calculations
- Shipboard safety guidelines

## Recent user reviews (10 of 43)

All indexed reviews: https://appshunter.io/ios/app/seabook-maritime/id708215141/reviews.md

### 5/5 — harika

*2026-03-29, version 3.1.0*

cok sade ve yararli bir uygulama 🙏

### 1/5 — USELESS

*2023-08-13, version 3.1.0*

Need to pay before you use.

### 1/5 — The text is cropped and I cannot read it properly. Please fix this

*2023-08-11, version 3.1.0*

I cant read the courses and i cant also zoom out

### 4/5 — Good app; needs update to accommodate newer phone screens

*2023-05-04*

I can’t hit back or contents buttons on iPhone 13 because it appears app is designed for older notchless screens

### 3/5 — annoying pop up

*2023-02-13*

I love the app, but every time i click anything a pop up tells me to buy the plus version. I am not going to do that.

**Developer response:** Seabook has been free since 2013. There are no ads and no subscription. Simply please close the pop-up and continue using the app at no cost.

Seabook Master is also available, offering additional content and features, with no pop-ups and expanded materials.

The app is designed to support maritime education and training, has served the industry for years, and will continue to do so with ongoing upgrades.

### 5/5 — Great resource

*2022-01-14*

Simple easy to use and informative.

### 5/5 — Yararlı

*2021-09-21, version 3.1.0*

Anlık bilgi, özellik ile stability bölümünde çok faydalı, el altında tutulması gereken bir program

### 1/5 — Garbage...

*2021-03-30*

... Just continually forces you to upgrade to the paid for version. Unusable... gave up and deleted the same day I installed it.

**Developer response:** Seabook is FREE since 2013 as the leading #1 Maritime App and there’s NO ads nor subscription. Simply dismiss the pop-up and continue using it free. Pro version surely has more contents and features. Remember, Seabook supports maritime education & training since 2013. It’s not garbage at all. Thanks!!!

### 5/5 — Guzel uygulama

*2020-10-04, version 3.1.0*

Destek amaclida aldigim guzel bir uygulama.. emegine saglik

### 4/5 — Recommending for download of seabook pro/master

*2020-09-19, version 3.1.0*

Everytime you click or open the new version always pop up. For someone who dont want to upgrade is there any option to disable it? But overall its a very great app. Thankyou

## Frequently asked questions about Seabook Maritime

### What maritime topics does Seabook cover?

Seabook covers a wide range of maritime topics including COLREG, GMDSS, Marine Engineering, Marine Meteorology, Shipboard Safety, Health at Sea, Life Saving Appliances, Shipmanagement, Navigation, Ship Stability, Country Flags, Ropework, and Knots.

### Is Seabook available offline?

Yes, Seabook is designed as an accessible offline mobile app, meaning you can use its reference materials without an internet connection.

### Who is the target audience for Seabook?

Seabook is designed for seafarers, cadets, maritime students, and master mariners who need quick access to essential maritime information.

### What is the rating of Seabook?

Seabook has a strong rating of 4.5 stars based on 19 user ratings, indicating a positive user experience.

### How frequently is Seabook updated?

The app was last updated on April 11, 2026, to version 4.0.0, suggesting ongoing development and content enrichment.

### What devices support Seabook?

Seabook is supported on iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users.

### What is the age rating for Seabook?

Seabook has an age rating of 4+, making it suitable for a broad audience including younger learners in maritime studies.

### Does Seabook contain advertisements?

No, Seabook is an ad-free application, allowing users to access information without interruptions.

## Version history (last 5 releases)

### 4.0.0 — 2026-04-11

Improved back-end to enable smooth user experience in both new and old devices. The top-screen/bar issues has been fixed.

### 3.1.0 — 2020-08-10

WoW! New update! Enriched contents!

+ Maritime English and SMCP in Seabook!
+ Port State Control 

Seabook is leading #1 Maritime App! Enjoy!

### 3.0.0 — 2020-06-11

Enriched contents with new subjects and powerful tools. Seabook is the leading #1 Maritime App.

### 2.0.1 — 2018-10-27

Minor content updates

+ Ropework
+ Navigation
+ Ship Stability 
+ Country Flags

and improved user experience for iOS12

### 2.0 — 2017-10-13

1) iOS 11 Support.
2) Contents in Navigation, Marine Engineering and Cargo operations are updated.

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## More apps by Ozgur GUNES

- [Seabook+](https://appshunter.io/ios/app/seabook-plus/id1517249755)
- [TÜRKKAPDER](https://appshunter.io/ios/app/turkkapder/id6761550884)
- [GemiKariyer](https://appshunter.io/ios/app/gemikariyer/id6762279317)
- [SeaCareer](https://appshunter.io/ios/app/seacareer/id6765698264)

All apps by Ozgur GUNES: https://appshunter.io/developer/708215144

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-21.*