The App Store has no shortage of mindless diversions, but the games featured within the Lumosity iPad app are actually designed to make you smarter. This brain trainer packs everything from basic pattern recognition challenges to spatial awareness puzzles, allowing you to sharpen your memory and attention span while having a good time in the process. Lumosity allows you to track your skills, so you can see how your BPI (Brain Performance Index) stacks up against other users. And while the full service requires a subscription ($14.99 per month, or $79.99 per year), you can enjoy a few of the app's brain teasers for free.
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