In addition to measuring your weight, the Fitbit Aria Wi-Fi smart scale tracks your body fat percentage, and BMI. Aria identifies you by your name or initials, and recognizes up to eight individuals. Simply download the Fitbit software to start linking your scale to your home wireless network. Every time you step on the scale, it wirelessly and automatically syncs your stats to your private Fitbit account, giving you real-time access, 24/ 7. You can keep tabs on the go with Fitbit’s free mobile app, set goals (and Fitbit will send you alerts when you’re nearing them), create a meal plan, or get a weekly email of your stats to stay on top of your progress.