Few apps have shaped their category the way Duolingo has shaped language learning. Its formula, short gamified lessons wrapped in streaks, points, and a cast of cheerful mascots, turned a chore that most people abandon into something millions genuinely do every day. That habit-forming design is the reason Duolingo is often the first app anyone recommends to a would-be language learner, and it remains the app’s defining strength in 2026.
But the picture has grown more complicated. Duolingo has been reworking how it monetizes the free tier, most visibly by shifting from the old hearts system toward an energy-based limit that has drawn real criticism from long-time users. At the same time, its premium tiers now lean heavily on AI features whose value depends on which language you study. This review weighs what Duolingo still does better than anyone against the friction that has crept in.
What it does well
Duolingo’s gamification is genuinely best-in-class, and it is not close. The streak, in particular, is a masterclass in behavioral design: the simple desire not to break a run of consecutive days keeps people practicing when motivation alone would not. Combined with bite-sized lessons that lower the barrier to starting, this makes Duolingo the most reliable habit-builder in the category. For the single hardest problem in language learning, which is showing up consistently, no competitor solves it as well.
The breadth of the catalog is another major advantage. Duolingo offers more than 40 languages for English speakers, reaching far beyond the usual Spanish-French-German trio into smaller and less commonly taught languages that many paid competitors ignore entirely. If you want to dabble in something unusual, Duolingo is often the only polished option available.
The free tier deserves credit too. It is not a crippled demo; you can genuinely learn with it, and on the web the energy limit does not apply at all, so browser-based practice remains effectively unlimited. For learners who add the Max tier and study a supported language, the AI-driven video call and roleplay features are a real step toward practicing speaking, an area where apps have traditionally been weak. The core experience is fast, reliable, and approachable enough that almost anyone can start in minutes.
Where it falls short
The most talked-about problem is the energy system. Replacing the old hearts model, it limits how much you can practice on mobile before you must wait or upgrade, and the reception has been notably negative. Community polls have found a large share of users actively dislike it, and the common complaint is that it can penalize even correct answers and turns learning into resource management. Whatever the intent, it makes the free mobile experience feel more like a freemium trial than it once did, and some users have migrated to alternatives as a result.
The deeper limitation is pedagogical. Duolingo is excellent at vocabulary, recognition, and reinforcing patterns, but its speaking and open-ended conversation practice remain thin. Even on Max, reviewers note the AI conversations can be short and lack detailed pronunciation feedback. The gamification that makes the app sticky can also subtly reward streak-keeping over genuine comprehension, so it is possible to maintain a long streak while progressing slowly toward actual fluency.
Finally, the premium math is awkward. Max costs roughly double Super, yet its remaining exclusive features, chiefly AI speaking and roleplay, cover only a limited set of languages, and a former Max-only explanation feature became free in 2026, thinning the tier’s differentiation. For many learners, the jump to Max is hard to justify.
Pricing
Duolingo runs a three-tier model. The free tier is ad-supported and, on mobile, subject to the energy practice limit, but it still gives full access to the lessons and language catalog. Super is the mainstream paid tier: it removes ads and the practice limit, adds offline access, and layers on personalized practice, though the underlying learning content matches the free version. Max sits on top, including everything in Super plus AI features such as simulated video call conversations and roleplay scenarios, available only for a limited set of languages. A Super family plan covers up to six accounts.
Pricing varies considerably by region, device, and the frequent promotions Duolingo runs, and seasonal sales can cut the cost of Super substantially. Because of that variability, we will not quote a fixed figure that may already be out of date. Treat any number you see as a planning range and check current pricing inside your own Duolingo app before upgrading, where you will see the exact offer, including any active discount, for your account and country.
Who it’s for (and who should skip it)
Duolingo is ideal for beginners and casual learners who want a low-friction, enjoyable way to build a daily language habit, and for anyone curious about a language that few other apps support. If your goal is to start, stay consistent, and build a solid base of vocabulary and grammar, few tools serve you better, and the free tier alone, especially on the web, can carry you a long way.
You should skip Duolingo, or at least not rely on it alone, if your priority is conversational fluency or fast speaking progress. Serious learners preparing for real-world use will need to supplement it with conversation practice, immersion, or more structured courses. If the mobile energy limit frustrates you, note that the web version sidesteps it, and if you are weighing Max purely for its AI features, confirm your language is supported before paying the premium.
The verdict
Duolingo is still the best on-ramp in language learning. Nothing else makes daily practice this easy to sustain, and nothing else covers this many languages with this much polish. The caveats are real, an increasingly restrictive free mobile tier and speaking practice that does not run deep, and they keep it from being a complete path to fluency. Treated for what it is, an outstanding foundation and habit-builder rather than the whole journey, Duolingo remains an easy app to recommend, with the sensible advice to start free and only pay once you know how you learn.
