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A Java Spaced Repetition API implementing various spaced repetition algorithms: Leitner's system, SuperMemo SM-2 algorithm and the Free Spaced Repetition Scheduler (FSRS)
Learn specialized English vocabulary in Persian — 246K words across 51 topics with Leitner flashcards, quizzes & pronunciation. Offline-first Material Design 3 PWA. | یادگیری لغات تخصصی انگلیسی با جعبه لایتنر
Lightweight, ad-free flashcards you self-host — no notifications, no gamification. Leitner spaced repetition in your browser, cards in an editable Google Sheet.