Brainscape - Find, create, and study SMART FLASHCARDS on any device. DOUBLE your learning speed using the most effective study system on the planet. Keep all your content in sync across Brainscape's website and your Android devices.
Blinkist - Key insights from 6,000+ bestselling books and podcasts
Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.
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Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.
StoryShots - Read, watch or listen to bestsellers in minutes. For FREE.