Pricing: Freemium
Editor rating: 4.6/5
Updated: July 2026
Free app to learn 40+ languages through daily gamified lessons and AI-adaptive exercises.
Editor's take: “Best language learning app with strong AI personalization” — Sohail Akhtar
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Editor-selected listing
Independent & reader-supported
Editor's Verdict
Official ReviewDuolingo's real achievement isn't teaching languages so much as getting people to show up every day, and the gamification — streaks, XP, leaderboards — is engineered for exactly that. As a habit-builder and vocabulary engine it genuinely works: lessons are short enough to fit a commute, spaced repetition aids retention, and the entire 40+ language catalog is free, which is rare. Where honest expectations matter is fluency. Grammar explanations are thin, speaking practice is limited next to real conversation, and the free tier's hearts system interrupts you after a few mistakes — so most language teachers, rightly, treat Duolingo as a supplement rather than a complete path to speaking a language well. Super ($6.99/month or $83.99/year) mainly removes ads and the heart limits, which is worth it for daily learners and skippable for casual ones. Taken for what it is — the best tool available for building and maintaining a daily language habit and a solid vocabulary base — it's excellent, and pairing it with conversation practice or a structured course is how you turn that base into real results.
4.6 / 5.0
Editor RatingReviewed by Sohail Akhtar
Lead Editor & Founder
Pros
What we like
- Free tier provides complete course access across all 40+ languages
- Short lesson format makes daily consistency achievable for most schedules
- Spaced repetition system supports long-term vocabulary retention
Cons
Limitations
- Free tier interrupts lessons after repeated mistakes via the hearts system
- Insufficient as a standalone method for reaching conversational fluency
Pricing
| Plan | Details |
|---|---|
| Free | Full access to all 40+ language courses with ads displayed during lessons and a hearts system that limits the number of mistakes allowed per session. |
| Paid | Duolingo Super at $6.99/month or $83.99/year removes ads, unlocks unlimited hearts, enables offline lessons, adds a streak freeze, and includes premium audio and reading content. |
Free plan available; Duolingo Super at $6.99/month or $83.99/year
What is Duolingo?
Quick Summary
Duolingo is a free language learning app used by over 500 million people worldwide. It teaches 40+ languages through short daily exercises that use gamification and spaced repetition to build consistent study habits. The app is designed for beginners and intermediate learners who want a structured, low-commitment way to practice a language every day.
Duolingo is a language learning platform that delivers structured lessons through a mobile app and web browser. Each session typically takes 5–10 minutes and covers vocabulary, grammar, speaking, and listening within a single exercise. The app uses spaced repetition and adaptive difficulty to adjust content based on a learner's past performance. Languages are divided into skill units organized along a guided learning path, and progress is tracked through XP points, daily streaks, and weekly leaderboards that introduce a light competitive element. Discover more tools. Duolingo is commonly used by students picking up a second language, travelers preparing basic vocabulary before a trip, and adults returning to a language they studied in school. The short lesson format fits naturally into commute routines or daily breaks. Some learners use Duolingo alongside textbooks or formal courses to maintain daily vocabulary exposure. The platform also offers Duolingo for Business, a team-facing version used by organizations supporting employee language learning Browse alternatives.
Read the full overviewShow less
Duolingo is effective at vocabulary acquisition and forming daily language habits. A study cited by Duolingo found that 34 hours of use can produce vocabulary gains equivalent to one semester of university-level language study. Discover more tools. That said, the platform has well-documented limitations: grammar explanations are minimal, speaking practice is limited compared to immersive methods, and the free tier restricts mistakes through a hearts system that pauses lessons. Most language educators treat Duolingo as a useful supplement rather than a standalone route to conversational fluency Browse alternatives.
Associated Tags
language learning, gamified lessons, spaced repetition, vocabulary builder, mobile learning app, AI adaptive difficulty, daily habit formation
Key Features
Courses in 40+ languages including rare ones
AI-adaptive lesson difficulty per learner
Spaced repetition vocabulary system
Voice recognition for pronunciation practice
Daily streaks, XP, and leaderboard system
Offline access on Super plan
Duolingo for Business team accounts
Target Audience
Who should use Duolingo?
Beginners starting a language from scratchStudents supplementing classroom language studyTravelers building basic travel vocabularyAdults forming a daily language practice habitProfessionals learning foundational workplace language skills
Real Use Cases
How professionals leverage Duolingo - Free Language Learning App for 40+ Languages
Discover practical workflows and real-world scenarios where Duolingo delivers key solutions.
01
Learning basic Spanish or French before an international trip
02
Maintaining daily Japanese or Korean vocabulary practice during a commute
03
Supplementing formal language coursework with short daily drills
04
Relearning a language studied in high school or university
05
Building foundational German or Italian skills for work or study abroad
06
Completing structured daily exercises as part of a self-study language routine
Top Alternatives
Dedicated alternatives page →Free
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RemNote
Revolutionary note-taking where notes automatically become Anki-level flashcards with spaced repetition - perfect med students/language learners.
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Anki
Free spaced repetition app handles 100K+ cards with audio/images - optimal review timing maximizes long-term memory.
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Reverso Context
Free contextual translation tool showing real bilingual sentence examples across 15+ language pairs.
Frequently Asked Questions
What is Duolingo?
Duolingo is a free language learning app that teaches 40+ languages through short gamified daily exercises using spaced repetition and adaptive difficulty.
Is Duolingo completely free to use?
Yes. The free plan includes full course access in all languages, though it displays ads and uses a hearts system that limits mistakes per session.
How many languages does Duolingo offer?
Duolingo currently offers courses in over 40 languages, including Spanish, French, Japanese, Korean, Chinese, German, Italian, Portuguese, and Arabic.
What does Duolingo Super include and is it worth it?
Duolingo Super ($6.99/month or $83.99/year) removes ads, unlocks unlimited hearts, enables offline lessons, and adds a streak freeze — worth it for daily learners frustrated by heart interruptions.
Can Duolingo make you fluent in a language?
Duolingo builds vocabulary and reading skills effectively, but reaching conversational fluency typically requires speaking practice and immersive study beyond what the app provides.
How does Duolingo's learning method work?
Duolingo uses spaced repetition and adaptive difficulty to personalize lessons, revisiting vocabulary at intervals designed to improve long-term retention based on your past answers.