Review · Apps
Duolingo review: the habit machine for language learning, and where it falls short
Duolingo makes daily language practice easy and fun, and the free tier is generous. Here is what it teaches well, what it skips and whether Super or Max is worth it.
Bitezine Editorial TeamRankings, reviews & guides 8 min read
AI generated
App (language learning) · Freemium
Duolingo
The best free way to build a daily language habit, but on its own it will not make you conversational.
What we like
- +Most of the core course content is free
- +Very large course catalogue, from Spanish and Japanese to Welsh and Hawaiian
- +Streaks, leagues and short lessons make daily practice stick
- +Clean, polished apps on iPhone, iPad, Android and the web
- +Extra courses for math, music and chess in the same app
- +Duolingo Score gives a rough, CEFR-aligned sense of progress
What could be better
- −Limited grammar explanation compared with structured courses
- −Free tier has ads and an energy limit that slows long sessions
- −Linear path gives you less freedom to choose what to study
- −Smaller courses get far less depth than Spanish, French or English
- −Speaking practice with real people is not part of the app
Best for: Beginners who want a fun, low-pressure daily routine
Visit Duolingo, Inc. →This Duolingo review looks at the most downloaded language learning app in the world and asks the question most people type into Google: is Duolingo worth it in 2026? The short answer is yes, as long as you know what it is. Duolingo is excellent at getting you to practise every day. It is weaker at teaching the grammar and real-time speaking you need to hold a conversation.
We did not run a months-long study of our own. This review is based on Duolingo's own documentation, its app store listings, published academic research and a wide range of owner reports and independent reviews.
What is Duolingo and how does it work?
Duolingo is a freemium learning app from the US company Duolingo, Inc., founded in Pittsburgh by Luis von Ahn and Severin Hacker. It teaches through bite-sized lessons that mix translation, listening, speaking, matching and short stories. Each lesson takes a few minutes, and the app uses spaced repetition to bring back words you are likely to forget.
Since a 2022 redesign, courses follow a single linear path rather than a branching tree. Some long-time users disliked the change because it removed the freedom to jump around, and Duolingo has kept it. The main courses (English, Spanish, French, German, Italian, Japanese, Korean, Mandarin and Portuguese) are built around the CEFR framework used in European language teaching.
Course range: which languages does Duolingo offer?
Duolingo offers more than 40 languages for English speakers, including less common choices such as Irish, Scottish Gaelic, Navajo, Hawaiian, Yiddish and Zulu, plus fictional languages like High Valyrian and Klingon. In 2025 the company also added a large batch of new language pairings built with generative AI, which widened choice but drew criticism from linguists about nuance and quality.
Depth varies a lot. The flagship courses are long and regularly updated, while smaller courses can be short or, in the case of Welsh, no longer actively developed. Beyond languages, the same app now includes math, music (piano and sheet reading) and chess lessons.
Is Duolingo effective? What the research says
Independent studies are more positive than many critics expect. A 2022 study in Foreign Language Annals found that adults who finished Duolingo's Spanish or French material reached reading and listening levels comparable with university students after four semesters. Other research found the app useful for building vocabulary at beginner level.
The limits are equally clear. A 2023 study funded by Duolingo itself found English learners gained little grammar. Speaking and writing get less attention than recognition tasks, and there is no human teacher. In practice, Duolingo works best as the daily core of a wider plan that also includes a grammar resource, listening to native content and conversation practice.
Free vs Super Duolingo vs Duolingo Max
The free version gives you the full course path, but with ads and an energy system (which replaced the older hearts) that limits how much you can do in one go after mistakes. For many learners doing ten minutes a day, free is enough.
Super Duolingo removes ads, gives unlimited energy, adds monthly streak repair and unlocks extra practice. Duolingo Max sits above it and adds generative AI features, notably Roleplay conversation practice and Video Call with the character Lily. The feature that explains your mistakes used to be Max-only but has since been opened up to all users. Family plans are available for both paid tiers.
- Free: all core lessons, ads, energy limit
- Super: no ads, unlimited energy, streak repair, extra practice
- Max: everything in Super plus AI speaking practice
Gamification: streaks, leagues and motivation
Duolingo's real strength is motivation. Daily streaks, weekly leagues of up to 30 learners, badges, Friend Streaks with up to five people and the famously persistent owl notifications all push you to open the app every day. For people who have started and abandoned languages before, this matters more than any teaching method.
The flip side is that the game can take over. Some users chase XP with easy lessons rather than tackling harder material, and the push notifications can feel nagging. If you notice you are protecting a streak rather than learning, switch to harder practice or turn off leagues.
Who should use Duolingo?
Duolingo is a strong choice for complete beginners, travellers who want the basics, parents learning alongside children, and anyone who struggles with consistency. It is also a good free refresher for a language you studied at school.
It is a weaker fit if you need a specific CEFR certificate, want to reach B2 or C1 quickly for work or study, or mainly want to speak. Those learners should pair it with a structured course, a tutor platform or a conversation group.
Value for money: is Super Duolingo worth paying for?
Because the free tier is so complete, paying is optional rather than required. Super makes sense if the ads or energy limit genuinely get in your way, or if you share a family plan. Max is priced higher and is only worth it if you will use the AI speaking practice regularly; otherwise the money is better spent on a few sessions with a human tutor.
Key specs
- Platforms
- iOS, iPadOS, Android, web
- Languages
- 40+ language courses, plus math, music and chess
- Pricing model
- Freemium: free with ads, Super and Max subscriptions
- Paid tiers
- Super Duolingo; Duolingo Max (adds AI-powered roleplay and video call practice)
- Progress measure
- Duolingo Score, aligned with CEFR on the main courses
- Gamification
- Streaks, XP, leagues, badges, Friend Streaks
- Launched
- 2012 (web), iPhone app from November 2012
Alternatives to consider
- Babbel: More grammar explanation and dialogue-based lessons, with a subscription-only model.
- Busuu: Structured CEFR-based courses plus feedback on writing and speaking from native speakers.
- Pimsleur: Audio-first method focused on listening and speaking, good for commuters.
Frequently asked questions
Is Duolingo worth it in 2026?
+
Yes, especially the free version, which covers the full course path. It is one of the best tools for building a daily habit and learning core vocabulary. Treat it as one part of your learning rather than the whole plan.
Can you become fluent with Duolingo alone?
+
Unlikely. Research shows finishing a main course can bring reading and listening to a solid intermediate level, but speaking and grammar get less practice. Add conversation practice and native content to move towards fluency.
Is Duolingo free?
+
Yes. All core lessons are free, supported by ads and limited by an energy system. Super Duolingo and Duolingo Max are optional paid subscriptions.
What is the difference between Super Duolingo and Duolingo Max?
+
Super removes ads and gives unlimited energy and streak repair. Max includes everything in Super and adds AI-powered speaking practice such as Roleplay and Video Call.
Is Duolingo or Babbel better?
+
Duolingo is better for motivation, course range and free use. Babbel explains grammar more clearly and uses more realistic dialogues, but it has no meaningful free tier. Many learners do well combining a free Duolingo habit with a structured course.
How long should I use Duolingo each day?
+
Ten to twenty minutes a day is a realistic target for most adults. Consistency matters more than long sessions, which is exactly what the streak system encourages.
Does Duolingo work offline?
+
Offline lessons have been tied to paid plans and mobile apps, and the feature has changed over time. Check the current settings in the app before relying on it for a flight.
Duolingo earns its popularity. It turns language learning into a daily habit, costs nothing to start and covers more languages than any rival. Just be honest about its limits: to speak confidently you will need grammar study and real conversation on top. Start with the free version, give it a month, and only pay for Super or Max if a specific feature will change how much you practise.
How we research: Reviews are based on the maker’s specifications, published independent tests and owner reports. Scores compare the product with others in its class.
Written by
Bitezine Editorial Team
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