Withings WS-30 Wireless Scale

Everything else in your house seems to connect to your smartphone, so why not your scale? The Withings WS-30 Wireless Scale ($130) sports built-in Wi-Fi and Bluetooth to let you keep track of your weight and BMI via the company's own app or one of the 60 other apps that support it. After each weigh-in, it automatically uploads and syncs your weight data, but that's not its only trick — it also automatically calibrates itself while you're away, helps keep you in the same position for accurate measurements, and gets to know your weight, so it knows if it's you on the scale or your roommate/spouse/overly curious dog.

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