250+ iOS apps curated and reviewed
The best seabook apps on iPhone average 3.9★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.7★ (222) | No | Yes | Aug 2026 |
| 2 |  | Free | 4.5★ (19) | No | No | Aug 2026 |
| 3 |  | $6.99 | 5.0★ (2) | No | No | Aug 2026 |
| 4 |  | Free | 4.4★ (214) | Yes | Yes | Aug 2026 |
| 5 |  | Free | — | No | No | May 2026 |
| 6 |  | Free | 4.0★ (2) | No | No | Aug 2026 |
| 7 |  | Free | 4.9★ (185) | No | Yes | Aug 2026 |
| 8 |  | Free | 4.8★ (50) | No | No | Jul 2026 |
Identify marine life with AI-powered photo recognition and explore detailed species information. Log your dives with comprehensive data, track conditions, equipment, and sightings. Organize your discoveries into personal collections and access information offline.
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.
This app provides comprehensive maritime information for professionals and enthusiasts. It offers tools for navigational and technical computations, designed for easy use at sea with offline accessibility and a user-friendly interface.
This app provides comprehensive guidance on maritime navigation rules and signals. It offers detailed information on flags, lights, sounds, and buoyage systems, along with interactive quizzes and a map feature. Designed for sailors, it ensures safe navigation on any vessel.
Access and download maritime e-learning content from your subscription. Build knowledge in safety, navigation, engineering, and well-being. Stay updated with courses and videos from experts to advance your career.
Learn maritime signal flags and the International Code of Signals through engaging levels and challenges. This app offers a structured approach to mastering flag meanings, abbreviations, and communication methods used at sea. It's designed for efficient memorization and progress, suitable for various maritime enthusiasts.
Access your training requirements and competence status, view fleet information, and manage your training schedule. The app allows for offline data access and notifies assessors when you are ready for evaluation.
Access a comprehensive offline dictionary of maritime terms and vocabulary. Easily search, bookmark, and manage your maritime learning with thousands of entries available without an internet connection.
Learn to tie a wide variety of essential knots with this comprehensive guide. It offers detailed instructions and visual aids for over 200 different knots, suitable for various practical applications.
Prepare for U.S. Coast Guard and FCC license exams with a comprehensive study platform. Access thousands of questions, track your progress, and take practice exams offline. Sync your learning across app and web versions.
This app helps seafarers manage their time, documents, and favorite locations. It features a seatime calculator, a calendar for tracking sea days with custom statuses, document storage with expiry reminders, and a place to save favorite locations.
Access comprehensive insurance information, including P&I and FD&D services. Browse and search for circulars, alerts, publications, and guides. Find contact details for global offices and correspondents.
This app digitizes sea service logs, simplifying trip recording and eliminating the need for a physical logbook. It also aids in trip planning, route measurement, and generating float plans. Users can create sea service verification forms for captain's license applications and renewals.