Anki was created in 2006 by Damien Elmes as an open-source flashcard program built around the science of spaced repetition. The core idea is simple: the app shows you flashcards at increasing intervals based on how well you remember them. Cards you struggle with appear more often; cards you know well appear less frequently. This algorithm is extremely effective for long-term memorization.
The desktop application is free on Windows, Mac, and Linux. AnkiDroid (Android) is also free, while AnkiMobile (iOS) costs $24.99 — that purchase helps fund development. Cards sync across devices through AnkiWeb, a free companion service. The interface isn’t pretty — it looks like it was designed by a programmer (because it was) — but the functionality is deep.
Anki’s power comes from its flexibility and customization. Users can create cards with text, images, audio, and even LaTeX formulas. The card template system supports complex layouts, and add-ons extend functionality further. A massive community shares pre-made decks on everything from Japanese kanji to medical board exam material.
The platform is especially beloved by medical students and language learners — communities where memorizing large volumes of information is essential. Medical students in particular have built entire study systems around Anki, with popular shared decks like “AnKing” containing tens of thousands of cards mapped to medical school curricula. Despite its dated appearance, Anki remains the gold standard for spaced repetition learning.
