Home-use smart scales are designed for reference.
All Wyze Scale devices use bioelectric impedance analysis (BIA) to estimate body composition, particularly body fat. BIA is a popular method to estimate body fat percentage, but there are many other methods available.
While a good estimate, the data calculated by your Wyze Scale may vary from those given by professional-grade medical instruments or methods.
Note: This applies to the original Wyze Scale, Wyze Scale S, Wyze Scale X, Wyze Scale Ultra, Wyze Scale Ultra BodyScan, and Wyze Scale Ultra BodyScan Plus.