The short version
Duolingo is free, gamified, and excellent at building a daily habit through short, playful lessons. Babbel is a paid subscription with more grown-up, conversation-focused lessons designed by linguists, with real grammar explanations. Both walk you along a fixed path of exercises. Neither is built for reading the real Swedish you actually want to understand, or for holding vocabulary in long-term memory once a lesson is over.
| Duolingo | Babbel | Smisli | |
|---|---|---|---|
| Price | Free with ads; optional Super | Subscription; 1 free lesson | Free to start; optional Premium |
| Swedish level | Beginner → intermediate | A1 → B1 | Beginner → B2 path |
| Style | Gamified skill tree | Dialogue lessons + grammar | Read real text, save words |
| Reads real Swedish | Limited | Limited | Core of the app |
| Memory system | Practice reminders | Review manager | FSRS spaced repetition |
| Best for | Casual daily habit | Structured beginners | Retention & real reading |
Where Duolingo wins, and where it doesn't
Duolingo's genius is the habit loop: streaks, points, and bite-size lessons that are genuinely hard to put down. For a free way to meet your first few hundred Swedish words and keep showing up, it is hard to beat. The limits show up later. The sentences are invented and often odd, the path is the same for everyone, and there is little support for reading the Swedish you care about, news, lyrics, a friend's message. Words drilled in a lesson tend to fade unless the app happens to resurface them.
Where Babbel wins, and where it doesn't
Babbel feels more like a well-made course than a game. Lessons are built around practical dialogue, grammar is explained rather than guessed, and the tone suits adults who want to hold a real conversation. The trade-offs: it costs money after a single free lesson, it still runs on a fixed track of lessons, and, like Duolingo, it is not designed for open-ended reading or for scheduling reviews of every word at the moment you're about to forget it.
A third way: read first, remember by design
Both apps treat reading as something you graduate to. Smisli makes it the starting point. You read real Swedish at your level, tap any word to look it up and save it, and every saved word becomes a flashcard scheduled by FSRS, the same modern algorithm behind advanced Anki setups, so it comes back exactly when memory is about to fade. There's a sequenced curriculum for absolute beginners, and Reader mode for your own texts once you're moving. The result is the habit-forming ease of an app with the retention of a serious memory system.
None of this makes Duolingo or Babbel bad, they're good at what they do. It means that if your real goal is to read Swedish and keep the words, a reading-first tool is a better fit than either lesson tree. See also our fuller Duolingo alternative write-up.