Flashcard and quiz apps range from simple digital card decks to adaptive systems that model each word's position in your long-term memory. Here are the best options by learner type, with honest assessments of where each one works best.

How to Choose the Right App

  • Beginners wanting a fast start: Duolingo or Quizlet (ready-made decks, no setup)
  • Serious learners wanting maximum retention: Anki (most powerful algorithm, requires setup)
  • Reading-based learners: TransLearn (vocabulary from your own reading, push notification review)
  • Learners who want audio context: Memrise (native speaker video clips)
  • Advanced learners wanting gap training: Clozemaster (fill-in-the-blank with 10,000+ sentences)

Anki

The benchmark for spaced repetition. Anki's algorithm calculates exactly when each card should appear based on your response history. Cards you answer confidently are shown less; cards you struggle with appear more. Fully customizable: text, audio, images, cloze deletions. AnkiDroid (Android) is free; AnkiMobile (iOS) is $25 one-time. The steepest learning curve of any app here, but the most powerful long-term vocabulary system available. App Store rating: 4.8/5.

Quizlet

The most widely used flashcard app globally. Largest library of user-created decks - if you need vocabulary for a specific course or textbook, it is probably already on Quizlet. Multiple study modes: flashcards, matching, written quizzes, practice tests. Free tier is generous. Paid Quizlet Plus (~$35/year) removes ads and adds offline access. Less sophisticated spaced repetition than Anki but far easier to start. App Store rating: 4.7/5.

Duolingo

Quiz-based learning throughout: multiple choice, matching, translation exercises. Gamification (streaks, XP, leaderboards) is effective for habit building. Free tier is usable; Duolingo Super (~$84/year) removes ads and adds unlimited mistakes. Limitation: vocabulary tops out at 1,500-2,000 words per language - you will need additional tools for advanced vocabulary.

TransLearn

Generates vocabulary reviews from words you save while reading authentic content in EPUB or PDF format. Quiz items come with reading context - you encountered the word in a real sentence before reviewing it. Push notification delivery brings review to you throughout the day. Different from flashcard apps in philosophy: vocabulary comes from your own reading, not a preset list. Best for learners already using reading as their primary input method.

Memrise

Combines spaced repetition with native speaker video clips showing each word used in context. The video clips add audio and visual memory hooks that text-only flashcards cannot. Free tier available; Memrise Pro (~$9/month) unlocks full content. Strong for European languages, weaker for less common languages. App Store rating: 4.7/5.

Clozemaster

Fill-in-the-blank vocabulary practice using thousands of real sentences. Designed for learners past the beginner stage who need high-frequency vocabulary solidified in sentence context. Excellent complement to Anki - use Anki for new vocabulary, Clozemaster for gap training on words you sort-of know.

Best Practice: Combine Input With Review

No flashcard app is as effective alone as when paired with reading input. Encounter a word in context while reading, save it to your flashcard system, then quiz yourself on it. The reading provides the initial contextual memory; the quiz layer reinforces it through active recall. This input-plus-review approach produces retention rates significantly higher than either method alone.