Fitbit Aria Wi-Fi Smart Scale: Get to where you want to be. Aria tracks your weight, body fat percentage and BMI, helping you understand and visualize your long-term progress. It wirelessly syncs so it's easy to view your stats with online graphs and mobile tools that help you stay motivated to reach your goals.
A bit expensive, but it works really well. Could I easily write down the measurements for less money? Yes. Am I as likely to do so? No. I felt the investment was worth it to complete the picture of my fitness goals, seeing the end result of weight and body fat % changes over time. Integrated perfectly with the Fitbit Ultra and the Fitbit website/app.