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Topo GPS vs Cartes IGN: catalog facts
Topo GPS	Cartes IGN
Freemium Prices are not listed on the homepage; check the app stores for current costs.	Free Free to use and open source under the GPL-3.0 licence.
Android, iOS	Android, iOS
Official topographic maps that can be used offline Route planning, recording and import in GPX, KML and CSV	Official IGN topographic and base maps Thematic geographic data layers from IGN and partners
Some formats, such as WFS and GeoJSON, are iOS only Pricing is not explained on the website	Available only in French Coverage and data focus on France
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is 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 October 2, 2026

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