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GPX Viewer vs Viking: catalog facts
GPX Viewer	Viking
Freemium Free to use, with offline maps and other features available as paid extras.	Free Free and open source under the GNU GPL.
Android	Windows, Linux
Opens GPX, KML, KMZ and LOC files Graphs for elevation, speed, heart rate, cadence and power	Edits tracks, routes and waypoints in GPX, KML and TCX Shows OSM, Bing Aerial and other map layers
Android only Offline maps require a paid upgrade	Real-time GPS and Mapnik rendering are not available on Windows GTK interface looks dated on Windows
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL
Not stated if an account is needed	No account needed
Not stated if it 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 23, 2026

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