Why would you need a scale to be smart, you ask? There are a lot of reasons, actually. A good smart scale not only measures your weight accurately, but can give close estimates of your body fat percentage, lean mass, and BMI. If that sounds like a lot of data to keep track of, that’s where the smarts start working for you. With built-in Wi-Fi, the scale will log your stats over time, automatically syncing it to the Fitbit app, giving you easy-to-read graphs so you can chart your health trends over time.