Anki is a flashcard application that implements spaced‑repetition using the SuperMemo‑2 algorithm. Users can create their own decks or import thousands of premade decks covering a wide range of topics, and the app supports text, images, audio and mathematical notation on cards. It includes features such as text‑to‑speech, detailed statistics, progress widgets and synchronization with AnkiWeb. The app is open source, highly customizable, and designed for efficient study during idle moments.