Teaches 40+ languages, app available in dozens of interface languages
Certificates
Yes
Offline access
Yes
Course Catalog72%
Duolingo covers 40+ languages, including some less commonly taught ones, though course depth trails dedicated language schools.
Teaching Quality74%
The gamified, bite-sized format is excellent for building a daily habit and vocabulary, but conversational fluency needs supplementing with real practice.
Platform UX95%
The app is exceptionally polished, playful, and habit-forming — arguably the best-designed app in this category.
Pros
✓Completely free core experience
✓Gamified streaks and rewards keep learners consistent
✓Bite-sized 5-10 minute daily lessons
✓Available for 40+ languages, including less common ones
Cons
–Limited speaking/conversation practice
–Doesn't build deep grammar understanding on its own
–Ads on the free tier
What’s included
Gamified streaks and leaderboards
Bite-sized daily lessons
Duolingo Stories for reading practice
Offline lessons (Super)
Duolingo English Test
Kids-friendly design
Pricing
The core app is genuinely free forever; Super ($6.99/mo billed annually) removes ads and adds offline lessons and unlimited mistakes.
Certificates
The separate Duolingo English Test is an accepted, lower-cost alternative to TOEFL/IELTS for many universities.
Mobile App
Duolingo is mobile-first, with Super subscribers getting full offline lesson access.
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