Hi, @shawni ! Body fat is body fat, it doesn't really matter what you use to measure it. The main advantage of the Fitbit scale (Aria) is that it integrates seamlessly into your Fitbit account, ie. automatically upload your weight and body fat % to your account. With the Tanita, I assume you will have to manually log the data into your account: Once you've done that, you're pretty much in the same situation as an Aria owner. Of course, you need to be aware of the shortcomings of the method used by your scale (I assume it's the same as the one used by the Aria, ie. bioelectrical impedance). For instance, the body fat value reported by such scales depends a great deal on your body's hydration level, on what you've eaten previously etc. There are other more reliable ways to measure body fat, but they are either a lot more expensive, less practical, or both. Other than that, congrats on your 21% body fat, which is very good for a female!
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