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OpenCPN vs Seapilot: catalog facts
OpenCPN	Seapilot
Screenshots	Screenshots
Best for: Sailors who want a full chartplotter on a laptop or onboard computer	Best for: Recreational boaters who want chart navigation on a phone or tablet
Free Free and open source.	Free + paid options Basic is free, Premium costs $39.99, and charts are bought separately except free US charts.
Windows, macOS, Linux, Android	Android, iOS
Runs on Windows, macOS, Linux, Raspberry Pi and Android Plugin manager with a catalog of community plugins Designed for use at the helm while underway No cost for the software itself	AIS and NMEA sensor support in Premium Weather routing with GRIB data GPX import and export
Desktop-style interface is less suited to phones than dedicated mobile apps Some chart sets must be obtained separately	Charts cost extra outside the US Most navigation features require Premium
Downloadable app	Downloadable app
Open source	Not open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Offline features available	Not stated if it works offline
Official website Full listing and sources Sources for OpenCPN opencpn.org play.google.com/store/apps/details Catalog checked September 23, 2026	Official website Full listing and sources Sources for Seapilot seapilot.com apps.apple.com/us/app/seapilot/id915818783 Catalog checked September 23, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.

Screenshots