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CoMaps vs OpenTopoMap Viewer: catalog facts
CoMaps	OpenTopoMap Viewer
Best for: People who want private offline navigation based on OpenStreetMap	Best for: Hikers who want OpenTopoMap and GPX tracks on an Android phone
Free Free and open source, supported by donations.	Free Free and open source under the Apache 2.0 licence.
Android, iOS	Android
Offline search and turn-by-turn routing for foot, bike and car Outdoor mode with trails, campsites and contour lines All 4 strengths for CoMaps Offline search and turn-by-turn routing for foot, bike and car Outdoor mode with trails, campsites and contour lines Offline Wikipedia articles for points of interest Community-governed and privacy-focused	Topographic maps with contour detail GPX import and display All 4 strengths for OpenTopoMap Viewer Topographic maps with contour detail GPX import and display Follows your location Caches loaded tiles
Public transport layer covers only some cities Map data quality depends on OpenStreetMap coverage in each area	Online client that needs a connection for new areas Android only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
Not stated if an account is needed	No account needed
Offline features available	Not stated if it works offline
Official website Full listing and sources Sources for CoMaps comaps.app f-droid.org/packages/app.comaps.fdroid apps.apple.com/us/app/comaps/id6747180809 Catalog checked September 23, 2026	Official website Full listing and sources Sources for OpenTopoMap Viewer github.com/Pygmalion69/OpenTopoMapViewer f-droid.org/packages/org.nitri.opentopo Catalog checked October 2, 2026

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