With theWithings Smart Body Analyzer ($150) you get much more data than you could ever get from a standard scale, all housed within a familiar-looking device. Sure, it measures your weight, but it also calculates body fat, resting heart rate, and indoor air quality. Additionally, all that data gets synced automatically with your mobile device using the Withings app for iOS. Using this data, you can track your progress, and get smarter about the way you manage your body.