Trips to the sleep clinic are expensive. The Zeo Sleep Manager ($100) is not. This sophisticated system consists of a sensor headband that tracks your actual sleep stages through the night and an iOS app that sorts through all the data, providing you with colorful, easily digestible charts and pointers on how you can enjoy more restful sleep. Oh, and it also functions as an alarm, waking you up at the optimal point in your sleep cycle. Zeo: because your smartphone didn't know enough about you already.