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Measures heart rate (not tested). WiFi connection optional. Measures air quality (CO2 level). Supports 8 users. Display is lit. Has an app for data. Can optionally connect using BlueTooth. Optionally shares data with other apps. Can set a goal weight. 0.2 pound resolution. Turns on automatically when stepped upon. Automatically recognizes user.


The Withings WS-50 is part of the Scale test program at Consumer Reports. In our lab tests, Scale models like the WS-50 are rated on multiple criteria, such as those listed below.

Weight accuracy: How accurately the scale measures body weight.

Weight repeatability: How repeatably the scale reports the user's weight.

Body-fat accuracy: How accurately the scale measures body-fat percentage.


Calculates BMI Calculates BMI Calculates Body Mass Index (BMI) based on the user's entered profile.
Water % Water % Reports body-water percentage.
Muscle % Muscle % Reports body muscle-mass percentage.
Bone % Bone % Reports body bone-mass percentage.
Users Users The number of users the manufacturer claims the scale can be used by.
WiFi WiFi Uses WiFi to connect to the internet to communicate readings.
Bluetooth Bluetooth Uses Bluetooth to connect to a smart device to communicate readings.
Auto recognition of user Auto recognition of user Units recognize the user based on weight.