Smart Body Analyzer Set goals, stay fit

The Smart Body Analyzer measures weight, body composition, heart rate and air quality.


Pinpoint your weight & body composition

Highly reliable

Get high-accuracy weight and body fat measurements, as well as your Body Mass Index.
Pick the right body type to optimize the fat mass measurement - if you exercise vigorously on a regular basis, switch to "Athlete mode".

The Smart Body Analyzer tracks

  • Weight
  • Fat mass
  • BMI
What is a healthy body composition?


Reach an unprecedented level of precision with the proprietary technologies developed by the pioneer of smart scales. Position Control™ helps you properly place your body for the most accurate weigh in. Gravity Compensation ensures a consistent measurements wherever your weigh yourself.


Automatic user recognition

This scale is made for the whole family: the scale is able to recognize up to 8 users. Everyone can have their own user profile and access it independently.


Fat mass

Consider variations of the fat-lean ratio and Body Mass Index to make sure you target the right pounds. Reveal patterns, become weight-aware.


Heart rate

Now you can take your pulse while you weigh yourself, with no extra effort. Just stand a few seconds on the Smart Body Analyzer while it measures your heart rate through your feet. Lowering your standing resting heart rate over time means that you are strengthening your heart, which is always good news.


Air quality

As the scale checks the indoor air quality through temperature and carbon dioxide measuring, the app builds a CO2-level graph with the important thresholds and lets you know when to clear the air. When placed in your bedroom - a rather confined space where you spend a lot of time - it can help you get the most restorative nights.


Follow your heart rate

One-stop tracking

Now you can take your pulse everytime you weigh yourself, with no extra effort - an ease of use only matched by the sophistication of the technologies involved.

Strengthen your heart

Consider your standing resting heart rate's history to know if you are strengthening your heart. Lowering it over time means that you are improving your fitness level.


Air quality screening

See the invisible

As the scale checks the indoor air quality through temperature and carbon dioxide measuring, the app builds a CO2-level graph with the important thresholds and lets you know when to clear the air.


Beyond the bathroom

Place the Smart Body Analyzer in your bedroom to make the most of the air quality monitoring. It will analyze your sleeping environment and help avoid air pollution related diseases.

  • Headache
  • Sore throat
  • Respiratory
  • Stinging
CO2 (ppm) Air Quality
Heavily contamined indoor air.
Contamined indoor air.
Ventilation recommended.

Stress-free usage

  • stress-free

    60 second set up

    Stand by the scale. Tap a few times on your mobile or tablet to download the app, and pair the scale with your Wi-Fi network or smartphone once for all.

  • stress-free

    Seamless process

    Just step on the scale from time to time. The data is automatically turned into easy to read graphs which are readily available to you before you even realize it.

  • stress-free

    Always there

    Access your securely stored data whenever and wherever you need it in the dedicated web and mobile apps (iOS and Android).

  • stress-free

    Hand in hand

    Use the free Health Mate app as a coach. Beyond the data, set weight goals and let us take you there. The app will break them down into weekly achievable targets while keeping you focused with relevant tips and reminders.

    Discover health mate
  • stress-free


    Whether you're into running, weight loss coaching, activity and calorie tracking, or cardio fitness, there's a great chance we're already compatible with your favorite apps.

    Discover partners


One scale fits all

This scale is made for the whole family: it is able to recognize up to 8 users. Everyone can have their own user profile and access it independently.

withings withings

Super-charge your experience

  • partner apps

    100+ partner apps

    Explore our wide and open ecosystem made of +100 partner apps - such as RunKeeper, MyFitnessPal and LoseIt!. If you're new to this, you'll discover how our open approach to healthcare can further leverage your body data.


    Enter the internet of Everything

    Create causality links with IFTTT - like triggering an action when you weigh in or when you achieve a goal - to help you take on your weight.

  • Data

    It's your data

    You can download your body data as a CSV file at any time, at no extra cost. It might seem normal but this is not the case with all health tracking ecosystems.

Tech specs

  • iOS
    • iPhone (4 or higher)
    • iPad (2nd generetion or higher)
    • iPod touch (4th generation or higher)
    • With iOS 7 or higher
  • Android
    • Bluetooth-enabled Android smartphone or tablet
    • With Android 2.3.3 or higher
  • Bluetooth
    Bluetooth Smart Ready
    (Bluetooth 4.0) connectivity, compatible with iOS and Android devices
  • Wi-Fi
    Wi-Fi 802.11 b/g/n (2.4 Ghz)
    WEP/WPA/WPA2-personal security compatible
  • Power source
    4x1.5V AAA alkaline (included)
  • Accuracy
    • 4 weight sensors
    • Weighing range between 5 and 180 kg (9-396 lbs)
    • 100g (0.2 lbs) graduation
    • Units: kg, lbs, st lbs
See all the tech specs

2 colors available

Users Reviews

Eric (Paris, France)


"I am really happy with your products since I had the first version of the Withings Wi-Fi Body Scale. I use the on line follow-up since 2011 et when I saw a new version was coming, I immediately understood it was made for me. Thanks to the in...

Albert (Grand Prairie, Texas, USA)


"I was surprised when the Smart Body Analyzer showed a definite pattern of rising CO2 every day, peaking over 1000 ppm at around 4AM."

Natalie (Birmingham, UK)


"I was shocked to find out our CO2 levels were in the 'bad' category, especially with a newborn in the room with us."



Implementing Internet of Things & Cloud with WiFi connection, web site and smartphone application. Works so smoothly and so intuitively that there is no need to read or consult any manual.

Press Review



"Laptop Editors' choice award: 4.5 stars. With the WS-50, Withings added some useful health measurements to its smart scales, including ambient air quality and your heart rate. Even better, its app lets you incorporate a lot of other data, from...

Men’s Health


"As you'd expect from Apple-endorsed scales, these work with beautifully designed simplicity."

Cult of Mac


“I love it when hardware integrates with iOS devices, endowing them with new powers they never hoped to possess. The Withings WS-50 smart scale, paired with their very good iOS app, does just that."

MSN Tech


"The Smart Body Analyzer really takes things to the next level."

Larry Page - Google CEO


"I just received a scale, and it measures air quality. And uploads it to the internet. That's amazing!"



"Its construction looks like the type of scale Apple might make... an impressive piece of hardware."

Sport Magazine


"This Super-smart set of scales not only weighs you and tracks you level of body fat; it also measures heart rate, syncs wirelessly with an app and measures the temperature and air quality of the room."



"The Withings Smart Body Analyzer is our new Editors' Choice for Wi-Fi-enabled scales, and would make a solid addition to any connected, health-conscious home."

Fox News


"A wifi-enabled bathroom scale might seem a little silly at first, but the Withings scale does much more than just measure your weight. The device can also track your standing heart rate and body mass index so you get a total picture of your he...



"Easy setup and sleek look... a great way to keep track of all your health and fitness goals."

Computer Active


"Exactly the same as the smart scale that we know and love. What's different is the aformentioned resting heart rate monitor and Co2 analyzer that’s built into the platform."

Women's Health


"It gives you a more accurate idea of just how much of your body is made up of fat, muscles and tissue."

London Evening Standard


"Quantified self' are the new health and fitness buzzwords, relating to clever gadgets and apps that track your performance. The Withings WS-50 Smart Body Analyzer is an elegant set of glass scales that recognises each member of the family and ...

The Telegraph


"The first scale which listen to the heart, and measure air quality."



"The first set of scale to listen to your heartbeat."



"The first smart scale to feature heart rate measurement and air-quality monitoring."

Essential Kitchen Bathroom Bedroom magazine


"The world's first weighing scale to measure heart rate and air quality from Withings has plenty to offer for weight loss, athletics training or simply monitoring fitness."

Time Out


"These slick scales measure your weight in kg,lb or stones, fat ratio and body mass index. Then, the scales send the data wirelessly to a website or direct to an app on your smartphone so you can see a graph of how it's changing!"



"This killer, next-generation Wi-Fi scale, is probably my favorite and the most compelling device of the lot."

Guardian Online


"Withings' next gen scale does everything but the ironing. These guys are part of a move that is set to revolutionalise and democratise healthcare, putting our health in their hands."

The Independent online


"Withings' Wi-Fi bathroom scales not only create a chart of [your] readings but can tweet the results everytime you step on."