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CalTopo vs OpenTopoMap: catalog facts
CalTopo	OpenTopoMap
Freemium Free to use with paid plans for additional features.	Free Free to use in the browser.
Android, iOS, Web	Web
Real-time collaborative editing of the same map Slope angle, snow depth, weather and public land layers	Topographic style with contours from elevation data Based on OpenStreetMap
Many data layers focus on the United States Some features require a paid plan	A map viewer rather than a route planner Site text is partly in German
Downloadable app, Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.