Duolingo Review
The habit machine
The best place to start and the worst place to finish. Use it to build a daily habit and a first thousand words, then graduate to something with real conversation.
Where Duolingo shines
- Free tier is genuinely usable — no other app comes close
- Streaks and daily goals build the habit that actually drives progress
- Max adds AI roleplay and per-answer explanations
- Huge course library, including several less-common languages
- Weak above intermediate — courses thin out fast at B2+
- Sentences can be artificial and rarely teach connected speech
- Grammar is inferred rather than taught unless you pay for Max
- Gamification can turn into streak-keeping rather than learning
Duolingo's real product is not the lessons, it is the habit. The streak, the daily goal, and the notifications do more for the average learner than a better-designed curriculum they abandon in week two. For an absolute beginner, that is worth a great deal, and the free tier means there is no reason not to try it.
The AI layer changed what the app can do. Duolingo Max introduces Video Call with Lily — an AI character you speak to in the target language — plus 'Explain My Answer', which tells you why the sentence you wrote was wrong instead of just marking it red. That closes the app's oldest weakness: it used to correct without ever teaching.
Where it still falls down is the ceiling. Courses beyond Spanish, French and German thin out quickly, and even the strong courses stop being challenging somewhere around B1. If your goal is exams or professional fluency, treat Duolingo as the on-ramp rather than the road.
Is Duolingo enough to become fluent?
No. It reliably takes a beginner to a solid A2/B1, but fluency requires conversation practice and input the app does not provide.
Is Duolingo Max worth it?
If you use the AI video call and explanations regularly, yes. If you only do the standard lessons, Super is enough.
How many languages does Duolingo teach?
Over 40 courses for English speakers, though quality varies enormously between the flagship and smaller courses.
See how Duolingo stacks up
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vs Rosetta Stone
vs PimsleurTechnology behind Duolingo
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