OpenSeaMap is a crowd-sourced nautical navigation tool that integrates with OpenStreetMap to provide free global sea charts. It offers specialized layers for weather data and harbor information, alongside standard plotting and tracking capabilities.
Overview · Full Intel report in progress
The App DNA
What makes this app unique?
For Marine enthusiasts and sailors seeking a community-driven, open-source alternative to commercial nautical charting software.
Key features
Provides free worldwide sea charts with integrated nautical information, including lights and harbor data.
Supports continuous tracking, waypoint management, and manual coordinate entry for navigation.
Allows users to store up to 1 million map tiles locally for use without an active internet connection.
Features optical zoom functionality to adjust chart reading size and map detail.
How much does it cost?
Velocity
Intense developmentShow more...
5 versions in history. Development pace: intense.
Who built it?
appdoctors UG
9 apps tracked · Navigation
Sea Weather Professional
Hackerspace Bremen
Landlubber
Coordinates Pro
Tasks Pro
Terminal RSS
GDPR Helper
Sonnenstand ProUser Sentiment
What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for OpenSeaMap
How's the Navigation market?
The rivals identified
The Analyst's Read
Key takeaways for OpenSeaMap
Where is it heading?
Bottom line
While the app offers a comprehensive feature set for nautical navigation, user feedback highlights significant concerns regarding stability, performance, and data detail compared to commercial alternatives.
Report last updated