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Clozemaster vs Readlang: catalog facts
Clozemaster	Readlang
Freemium Free to play, with a paid Pro tier that adds advanced features.	Freemium Free to start, with paid plans available.
Android, Web	Web, Browser extension
Vocabulary learned inside real sentences Over 170 language pairings	Click-to-translate on any text or website Translated words saved automatically as flashcards
Advanced features require Pro Less suited to complete beginners with no grammar basics	Best suited to learners who can already read simple texts Some features require a paid plan
Downloadable app, Web application	Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is 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.