Anki

Anki is a free and open-source flashcard program using spaced repetition, a technique from cognitive science for fast and long-lasting memorization.

High-efficiency Learning
The core of Anki App is an advanced algorithm, developed and refined by our lead neuroscientist, to save you time. As you study, it learns how well you know each flashcard, then prioritizes them for you, so you study the things you don't know, without wasting precious time on the things you already do.

Batteries-included
Get started right away with pre-made flashcards. Anki App comes with a collection of public flashcard decks built-in. Download more, from a selection of 80+ million flashcards available from Quizlet and other sources. If youve previously used the AnkiWeb service (not affiliated) to store flashcards, we can import from there too. For content from other sources, we provide a service to load flashcards from spreadsheets in TSV format, which many tools can produce.

Rich Content Creation
Anki App lets you make your own flashcards, on any device. Creating cards is as easy as typing what you want on the front and back of each card. In addition to plain text, you can add images and sound* to your flashcards (*at the moment, sounds must be added using the web clientcoming soon to other clients). When youre ready to get more advanced, Anki App lets you create "custom layouts" to present multiple fields of information, styled with HTML and CSS.