Duolingo and Anki are the two apps every language learner ends up comparing, and they couldn't be more different. Duolingo is polished, fun, and full of streaks. Anki is ugly, powerful, and ruthlessly effective. The truth most guides bury: the best learners use both — but neither solves the reason people quit.
The short answer
Use Duolingo to build a daily habit and cover the basics painlessly, especially as a beginner. Use Anki once you're serious, to memorize vocabulary permanently with spaced repetition. Duolingo keeps you showing up; Anki makes what you learn actually stick.
| Feature | Duolingo | Anki |
|---|---|---|
| Fun factor | Very high | Low |
| Learning efficiency | Moderate | Extremely high |
| Setup effort | Zero | Steep learning curve |
| Long-term retention | Weaker | Best in class |
| Price | Free + Super | Free (iOS ~$25 one-time) |
Duolingo: the habit builder
Duolingo's genius is engagement. Streaks, leagues, and that infamous owl keep hundreds of millions coming back daily. For getting started and staying consistent, nothing's easier. The criticism is that it's shallow — you can hit a 500-day streak and still struggle to hold a real conversation, because the app optimizes for time-in-app as much as fluency.
Anki: the retention machine
Anki uses spaced repetition: it shows you a card right before you'd forget it, which is the single most efficient way to memorize vocabulary. It's endlessly customizable and completely free on desktop. The catch is the ugly interface and setup curve — and the fact that reviewing 100 cards a day is a grind with no confetti to reward you.
Why most people quit anyway
Neither app fixes the actual failure point: the day you skip, then the week, then forever. Learners who succeed almost always have a tutor, a language partner, or a group expecting them. Real accountability outlasts any streak. That's the idea behind Groop — a small group and a daily check-in, so "practice today" is something someone will notice you did.