Anki is a powerful, open-source flashcard application designed to help users learn and memorize information more effectively. By utilizing spaced repetition, a scientifically-proven learning technique, Anki optimizes the intervals at which flashcards are reviewed, ensuring that users can retain information over the long term. This makes it particularly useful for students, language learners, and professionals needing to master complex material. Anki is highly customizable, allowing users to create their own flashcards with text, images, sounds, and even LaTeX equations, or download shared decks on a wide range of subjects. It is available on multiple platforms, including Windows, macOS, Linux, iOS, and Android.