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GWeatherRouting vs LuckGrib: catalog facts
GWeatherRouting	LuckGrib

Best for: Sailors planning coastal or offshore routes with weather forecasts	Best for: Sailors planning passages with GRIB weather forecasts
Free Free and open source under GPL-3.0-or-later.	Paid Purchased through the Apple App Store.
Windows, Linux	macOS, iOS
Plans routes using GRIB weather data and boat polar diagrams Imports and exports GPX points and tracks Supports chart formats including GeoJSON, KAP, and GeoTIFF Available for Linux and Windows	Direct downloads of GFS, CMC and WW3 models Weather routing for sailing passages Designed for use while offshore Fast animated forecast display
The listed downloads are for Linux and Windows	Apple platforms only Paid app
Downloadable app	Downloadable app
Open source	Not open source
License: GPL-3.0-or-later	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Offline features available
Official website Full listing and sources Sources for GWeatherRouting gweatherrouting.org Catalog checked October 8, 2026	Official website Full listing and sources Sources for LuckGrib luckgrib.com apps.apple.com/us/app/luckgrib/id1318450117 Catalog checked October 2, 2026

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