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Locus Map vs Cartes IGN: catalog facts
Locus Map	Cartes IGN
Freemium Free to use, with paid features available.	Free Free to use and open source under the GPL-3.0 licence.
Android, iOS	Android, iOS
Offline maps and offline routing Detailed route planner with elevation and surface information	Official IGN topographic and base maps Thematic geographic data layers from IGN and partners
iOS gets a Lite version Many options can make it complex for casual users	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.