Best Free Spaced Repetition Apps for Language Learners (2026)

Published September 1, 2026 · 6 min read

Short answer: For SM-2 spaced repetition with the least manual setup, WeaveWords and Anki are the strongest free options — WeaveWords automates card creation with AI, Anki offers deeper manual customization. Quizlet fits shared classroom study sets. Taalhammer and VibeLing are worth a look if you want production drills or ultra-lightweight capture instead of a full flashcard system. Duolingo and Memrise fit learners who want a guided course rather than a flashcard system at all.

How we're comparing these

Four things matter most for language vocabulary specifically: whether the app uses a real spaced repetition algorithm (not just "smart" shuffling), how much manual work card creation takes, whether it's actually free to use daily, and whether you can bring your own vocabulary instead of following a fixed course.

WeaveWords

Built specifically around SM-2 spaced repetition with AI doing the card-creation work: add a word and get a translation, contextual example sentence, and text-to-speech pronunciation automatically. Free forever for unlimited collections, reviews, and progress tracking, with real web, iOS, and Android apps that sync. Best if you want proven SM-2 scheduling without the manual deck-building overhead. See the full comparison with Anki.

Anki

The original mainstream SM-2 tool, and still the most customizable — a huge add-on ecosystem, fully offline file-based decks, and community-shared decks for niche subjects. The tradeoff is manual card creation and a paid official iOS app. Read more in Looking for an Anki Alternative? Here's What to Know.

Quizlet

Strongest for shared classroom study sets and game-based review modes (Match, Gravity, Learn). Its free tier is limited and a true spaced-repetition-style scheduler is a paid-tier feature, which makes it a better fit for exam cramming than long-term retention. See the full comparison with Quizlet.

Taalhammer

Built around active production — generating full sentences from memory rather than recognizing a translation — layered with interleaving and a passive-listening "Language Radio" feature. A strong pick specifically if speaking fluency, not vocabulary coverage, is the bottleneck. See the full comparison with Taalhammer.

VibeLing

The lightest-weight option here: no signup, add a word you just encountered, get an AI translation and audio, review in short daily sessions. Trades organized collections and multi-platform sync for near-zero friction. See the full comparison with VibeLing.

Duolingo and Memrise

Both are structured, gamified courses rather than flashcard systems — a better fit if you want a guided curriculum to follow instead of choosing your own vocabulary. Neither is built around a user-editable spaced repetition deck the way the apps above are.

Bottom line

If you already know spaced repetition works and just want the least friction getting a deck running, WeaveWords or Anki are the two strongest free options — pick WeaveWords if you'd rather AI fill in the cards, or Anki if you want maximum manual control. If speaking is the actual bottleneck, look at Taalhammer. If you just want to jot down words as you hear them with zero setup, VibeLing does that well. If you want a guided course instead of a flashcard system, Duolingo or Memrise fit better than any of the tools above.