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OpenSeaMap vs iNavX: catalog facts
OpenSeaMap	iNavX
Screenshots	Screenshots
Best for: Sailors and paddlers who want free, community-maintained nautical charts	Best for: Cruising boaters who want a handheld chartplotter on an iPhone or iPad
Free Free to use and download.	Free + paid options Free NOAA US charts are included; other providers' charts and features may cost extra.
Web	Android, iOS
Free charts built on OpenStreetMap Downloads for OpenCPN, Garmin and Lowrance Anyone can add and correct seamarks	Supports more than 25 chart providers in one app Live AIS, route planning and GRIB weather Instrument overlays for speed, heading and depth Free NOAA US charts
Community data is not an official chart Coverage and depth detail vary by region Some downloadable chart bundles are several years old	Commercial charts from other providers are bought separately Focused on phones and tablets rather than desktop use
Web application	Downloadable app
Not open source	Not open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for OpenSeaMap openseamap.org Catalog checked September 23, 2026	Official website Full listing and sources Sources for iNavX inavx.com Catalog checked September 23, 2026

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

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