This app provides access to nautical chart data and map image tiles generated by a collaborative open-source mapping project. It serves as a browser for freely usable marine navigation information.
Open Sea OpenSeaMap Browser by Mobile Geographics


250+ iOS apps curated and reviewed
The best open sea openseamap browser apps on iPhone average 3.9★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 3.2★ (5) | No | No | May 2026 | ||
| 2 | Free was $0.99 | 1.0★ (1) | No | Yes | Sep 2026 | ||
| 3 | Free | 4.7★ (3.1K) | No | No | Sep 2026 | ||
| 4 | Free | 5.0★ (11) | No | Yes | Sep 2026 | ||
| 5 | Free | 4.8★ (20) | No | No | Sep 2026 | ||
| 6 | Free | 4.6★ (37K) | No | Yes | Sep 2026 | ||
| 7 | Free | 4.1★ (51) | Yes | No | Sep 2026 | ||
| 8 | Free | 3.9★ (16) | Yes | Yes | Sep 2026 |


This app provides access to nautical chart data and map image tiles generated by a collaborative open-source mapping project. It serves as a browser for freely usable marine navigation information.






This app provides a free, worldwide nautical chart with detailed sea information, including lights, weather data, and harbor details. It offers chartplotting, waypoint management, and offline map caching for navigation. Users can mark locations, enter coordinates, and adjust chart zoom for optimal viewing.






Navigate and explore with detailed offline maps and GPS guidance. Plan, record, and import routes for travel, hikes, and rides without needing an internet connection. Enjoy privacy-first, battery-efficient navigation with extensive points of interest.