Leitner Box is the ultimate tool to learn, memorize, and retain information using the proven Leitner system and spaced repetition techniques. Study smarter, not harder. Leitner Box optimizes your learning by focusing on the flashcards that need the most attention. Whether you’re a student preparing for exams, a language learner, or a professional mastering new skills, this app makes studying efficient and effective. Key Features: - NO ADS, even in the free version — focus on learning without d