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Duolingo vs Rosetta Stone: catalog facts
Duolingo	Rosetta Stone
Freemium Free courses, with paid subscriptions including Duolingo Max and a one-week free trial.	Paid Paid membership, with a free lesson to try first.
Android, iOS, Web	Android, iOS, Web
Short lessons that fit into a few minutes a day Habit-building features such as streaks and reminders	Immersive lessons without relying on translation Speech recognition feedback on pronunciation
AI features of Max require a paid subscription Game-like format is lighter than a structured course	Requires a paid membership beyond the free trial lesson Immersion without translation can be slow for grammar-heavy learners
Downloadable app, Web application	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 September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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