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OpenTopoMap Viewer vs AlpineQuest: catalog facts
OpenTopoMap Viewer	AlpineQuest
Free Free and open source under the Apache 2.0 licence.	Freemium A free version is available alongside a paid full version on Google Play.
Android	Android
Topographic maps with contour detail GPX import and display	Caches online topo maps for use without coverage Supports file-based maps such as MemoryMap
Online client that needs a connection for new areas Android only	Android only, with no iOS version No technical support on LineageOS or /e/OS
Downloadable app	Downloadable app
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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