Seabook

Seabook Maritime is a freeware handbook application for all Seafarers!

Ozgur Dogan GUNES · com.ozgurdogangunes.seabook

5.0 out of 5 (1 rating) 1M+ downloads v4.0.0 59.9 MB Android 7.0+ PEGI 3 · Everyone

Download APK 59.9 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v4.0.0 (30333)
Updated: Apr 17, 2026 (6 months ago)
APK size: 59.9 MB
Requires: Android 7.0+ (API 24)
CPU support: x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Education (app)
Listed since: Jan 16, 2023 (at least)
Permissions: 26
Website: seabook.ozgurdogangunes.com
Developer contact: [email protected]

About this APK

Seabook is an app by Ozgur Dogan GUNES in the Education category, listed since at least January 2023. It includes native code for x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

Since version 2.0.1, the minimum Android version rose from 4.0 to 7.0. It asks for 26 permissions, none of them sensitive. Compared with version 3.1.1, it adds 8 new permissions: “Control vibration”, “Prevent the device from sleeping”, “Read app badge” and 5 more.

What's new in v4.0.0

Updated contents

Description

From the listing uploaded by “appupdater”.

Seabook is an information and knowledge source for marine professionals, sailors as well as sea enthusiasts. This easy-to-use, accessible-offline mobile app serves as a reference tool for key elements of Ship stability, Navigation, Shipmanagement, Shipboard Safety, COLREG and Marine engineering, and is designed for seafarers, cadets, maritime students and master mariners alike. Seabook contains details on; COLREG (International Regulations for Preventing Collisions at Sea) GMDSS (Global Maritime Distress and Safety System) Marine Meteorology Shipboard Safety Personal Health International Code of Signals Shipmangement & Business Marine Engineering Navigation at Sea Ship Stability Ropework Country Flags Knots Developed by Capt. Ozgur Dogan GUNES www.ozgurdogangunes.com

Version history

3 versions are listed, going back to v2.0.1. Since v4.0.0 it requires Android 7.0+.

v4.0.0 LATEST Apr 17, 2026 59.9 MB TRUSTED v3.1.1 Sep 7, 2026 7.6 MB TRUSTED v2.0.1 Apr 17, 2026 3.8 MB TRUSTED

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Apr 17, 2026.
Certificate issued to “Seabook” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Apr 17, 2026
Validated against Google Play Apr 17, 2026
Signed byCN=Ozgur Dogan GUNES, OU=Unknown, O=Seabook, L=Istanbul, ST=Atasehir, C=TR
Signing certificate (SHA-1)A8:84:25:2E:48:8E:17:15:4C:1F:D2:65:17:B4:7E:8A:A8:7F:64:23
File MD51d28084837a37bad71786fabc4743343
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (26)

Seabook requests 26 permissions, none of them sensitive.

Badge read (custom) com.sec.android.provider.badge.permission.READ
Badge write (custom) com.sec.android.provider.badge.permission.WRITE
Badger badge count read (custom) me.everything.badger.permission.BADGE_COUNT_READ
Badger badge count write (custom) me.everything.badger.permission.BADGE_COUNT_WRITE
Control vibration android.permission.VIBRATE
Full network access android.permission.INTERNET
Home broadcast badge (custom) com.sonyericsson.home.permission.BROADCAST_BADGE
Home provider insert badge (custom) com.sonymobile.home.permission.PROVIDER_INSERT_BADGE
Internal broadcast protection (app-defined) com.ozgurdogangunes.seabook.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Launcher change badge (custom) com.huawei.android.launcher.permission.CHANGE_BADGE
Launcher read settings (custom) com.htc.launcher.permission.READ_SETTINGS
Launcher read settings (custom) com.huawei.android.launcher.permission.READ_SETTINGS
Launcher read settings (custom) com.oppo.launcher.permission.READ_SETTINGS
Launcher update badge (custom) com.majeur.launcher.permission.UPDATE_BADGE
Launcher update count (custom) com.anddoes.launcher.permission.UPDATE_COUNT
Launcher update shortcut (custom) com.htc.launcher.permission.UPDATE_SHORTCUT
Launcher write settings (custom) com.huawei.android.launcher.permission.WRITE_SETTINGS
Launcher write settings (custom) com.oppo.launcher.permission.WRITE_SETTINGS
Prevent the device from sleeping android.permission.WAKE_LOCK
Push messaging (app-defined) com.ozgurdogangunes.seabook.permission.C2D_MESSAGE
Read app badge android.permission.READ_APP_BADGE
Receive push notifications com.google.android.c2dm.permission.RECEIVE
Run at startup android.permission.RECEIVE_BOOT_COMPLETED
Run foreground services android.permission.FOREGROUND_SERVICE
Show notifications android.permission.POST_NOTIFICATIONS
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch

Seabook APK: questions and answers

Is there a version of Seabook for older Android phones?

The current version needs Android 7.0 or later. Version 2.0.1 is the newest listed build that installs on Android 4.0 and later. Get version 2.0.1 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Seabook APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 1d28084837a37bad71786fabc4743343.