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LingoDeer vs Busuu: catalog facts
LingoDeer	Busuu
Freemium Full access to all languages and features is a paid purchase, with multi-year plans…	Freemium Free to start, with a paid subscription for full access.
Android, iOS	Android, iOS, Web
Grammar-based curriculum written by language teachers Native speaker audio instead of text-to-speech	Feedback from a community of native speakers Pronunciation feedback in speaking practice
Full access requires payment Mobile apps only in the listed downloads	Full course access requires payment Proprietary service that needs an account
Downloadable app	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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