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Brainscape's online flashcards optimize your studying, by repeating harder concepts in the perfect interval for maximum memory retention. Brainscape allows trainers to organize "decks", add images & sounds, and collaborate with multiple editors for real-time content deployment. Brainscape’s intelligent study system has been designed in accordance with decades of proven cognitive science to help you learn faster and remember longer than with any other flashcard app. (And we don’t waste time on games. Brainscape distills any subject down into bite-sized facts (neatly organized into decks and classes), which are posed as question-and-answer pairs, compelling you to actively recall information from scratch. You then rate how well you know each concept on a scale of 1 to 5, and Brainscape determines the perfect time interval at which to repeat that flashcard again.

Flashcard Machine allows the user to quickly design custom study sessions based on his or her past performance over multiple study sessions. It is the only flashcard application that reproduces the control that a student traditionally has in studying flashcards. Linked to one of the largest flashcard repositories on the internet, this app already has all the flashcards that you will ever need. Automatically sorts and tracks flashcards into piles throughout the study session. Caches images for studying flashcards even without internet connection.