Best Free Spaced Repetition Apps Compared
A good free app does the scheduling for you — you just show up and review.
You don't need to pay a cent to get a great spaced-repetition setup. Several free apps handle the timing, sync across devices, and let you build or download decks. The hard part is picking the one that fits how you like to study.
Here's an honest rundown of the main free options and who each suits best.
Key takeaways
- Free apps cover everything most learners need.
- Anki (with AnkiDroid) is the most powerful and flexible.
- Prefer ready-made courses? Try Memrise-style apps.
- Pick for how you study, not for the longest feature list.
Anki & AnkiDroid
Anki
The gold standard for do-it-yourself decks. Free on desktop and Android (AnkiDroid), it schedules automatically, syncs everywhere, and supports audio, images, and cloze cards for grammar. The trade-off is a steeper setup and a plain interface. If you want full control and plan to learn a lot, this is the one — and it's the backbone of the Anki vs Leitner box debate.
Course-style apps
Memrise & similar
If building your own cards sounds like a chore, course-style apps give you pre-made vocabulary sets with a spaced-repetition layer and often native-speaker audio or video. You trade some flexibility for convenience, and free tiers can be limited, but they're a gentle on-ramp for beginners.
Simple, lightweight options
Lightweight flashcard apps
Several smaller free apps offer clean, no-frills flashcards with basic spacing. They lack Anki's depth but win on simplicity — great if you just want to type a few words and review them without settings to fiddle with.
Quick comparison
| App type | Best for | Watch out for |
|---|---|---|
| Anki / AnkiDroid | Control, scale, custom cards | Setup learning curve; paid on iPhone |
| Course-style | Ready-made decks, beginners | Limited free tier, less flexible |
| Lightweight apps | Simplicity, quick start | Fewer features, basic scheduling |
Don't shop for features. Shop for the app you'll still be opening in three months.
Which should you choose?
If you like control and plan to learn thousands of words, start with Anki — the setup pays off fast. If you'd rather press "start" and follow a course, a course-style app gets you going with less friction. And if you just want something dead simple, a lightweight flashcard app is plenty. Whatever you choose, the app only schedules; the learning still comes from good cards and strong encoding. Prefer paper? A hand-built Leitner box works just as well.
Frequently asked questions
Anki (with AnkiDroid on Android) is the most popular free option for its power and flexibility. The best for you depends on whether you want ready-made courses or full control.
Anki is free on desktop and Android. The official iPhone app is paid, which helps fund development, but the web and desktop versions are free.
No. Free apps cover everything most learners need. Paid features are conveniences, not requirements — the core engine is the same.
Pick an app, add five words, begin
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The VocabVaultz team
We're language learners who got tired of forgetting words we'd "already learned." Everything here is a method we've actually tried on our own vocabulary. More about us →
