Best 8 Spaced Repetition Apps in 2026: Feature Comparison

Anki is the best spaced repetition app, available as AnkiDroid on Android and AnkiMobile on iPhone and iPad. This list covers 8 apps, from dedicated flashcard tools to language, note-taking and book-summary apps. Picks are based on verified store and official listings, not hands-on testing.

Quick comparison table

Built around spaced repetition: AnkiDroid, AnkiMobile, Brainscape and RemNote. Spaced repetition as one feature among others: Quizlet, Memrise, Duolingo and Headway.

Types: AnkiDroid, AnkiMobile, Quizlet and Brainscape are flashcard apps. RemNote is a note-taking app. Memrise and Duolingo are language apps. Headway is a book summaries app.

1. AnkiDroid Flashcards

Best for: Android users who want a free, flexible flashcard app.

AnkiDroid Flashcards is free and open-source, and it uses spaced repetition scheduling to time your reviews. What sets it apart is compatibility with the wider Anki deck ecosystem, so you can use existing Anki decks instead of starting from scratch. Android only.

2. AnkiMobile Flashcards

Best for: iPhone and iPad users who want the official Anki experience.

AnkiMobile Flashcards is the official Anki app, and it schedules reviews with spaced repetition. Its best feature is syncing with AnkiWeb. It's iOS only and paid, so check the current price on the store page before you buy.

3. Quizlet

Best for: students who want quick flashcards plus several study modes.

Quizlet offers learning modes and spaced-repetition-based review scheduling on iOS and Android. Its main draw is having multiple study modes in one app. Compared with Anki, the listing points to a more mode-driven experience. Anki is the one built around scheduling control.

4. Brainscape

Best for: people who want a simple flashcard routine without much setup.

Brainscape uses confidence-based spaced repetition. You rate how well you knew each card, and that rating decides when the card comes back. This is what makes it stand out. It runs on iOS and Android.

5. RemNote

Best for: students who take notes and want flashcards from the same material.

RemNote is a note-taking app with built-in spaced repetition flashcards. Its best trick is keeping notes and flashcards in one place, so you aren't copying material between apps. It runs on iOS and Android.

6. Memrise

Best for: language learners who want ready-made courses.

Memrise uses spaced repetition and offers built-in courses alongside community-created content. That mix is what sets it apart. It focuses on languages, so it's a weaker fit for other subjects.

7. Duolingo

Best for: beginners who want guided language practice with built-in review.

Duolingo uses spaced-repetition-style practice to schedule review of vocabulary and lessons. Review is built into the lessons, so there's no deck building. It isn't a general flashcard tool, and you can't study your own subjects.

8. Headway

Best for: readers who want to retain what they learn from nonfiction book summaries.

Headway pairs book summaries with automated review tools based on spaced repetition. Those review tools, attached to the summaries, are the main feature. It's the most niche pick here, and it works for retention, not custom flashcards.

Frequently asked questions

What is a spaced repetition app?

It shows you material just before you're likely to forget it. Easy items come back less often, and harder ones return sooner.

Which spaced repetition app is best for free use?

AnkiDroid is the clear pick for free use on Android. Pricing can change, so check each app's listing before committing. iPhone users should know AnkiMobile is paid, and AnkiWeb syncing lets you carry your decks across devices.

Should I choose a flashcard, language or note-taking app?

Pick a flashcard app like Anki or Brainscape for any subject you define yourself. Choose a language app for guided courses, or RemNote if you want flashcards made from your notes. Reviewing a little each day generally works better than occasional long sessions. This article is based on verified listings, not hands-on testing.

The verdict

Anki is the strongest overall pick: AnkiDroid on Android, AnkiMobile on iOS. It combines spaced repetition scheduling, deck compatibility and AnkiWeb sync.

Brainscape is the runner-up for simpler flashcard studying, and RemNote suits people who want notes and flashcards together. Language learners should look at Memrise or Duolingo.