This app takes the pain out of making Flashcards by serving them up on a touchscreen. But more than a mere paper replacement, Brainscape uses its timing to users’ learning needs. The app is free, but you can purchase pre-made sets of flashcards to help learn things like foreign language vocabulary or world geography. Expand your knowledge and share with family and friends with the sharing feature so they can exercise their brain too! Brainscape is available for free on iOS.