The Withings ScanWatch 2 may be the most advanced health-tracking watch we've seen

Photo of the Withings ScanWatch 2 on someone's wrist
(Image credit: Withings)

What you need to know

  • Withings announced two new hybrid smartwatches on Thursday: the ScanWatch 2 and ScanWatch Light. 
  • The ScanWatch 2 has dual temperature sensors, 16 PPG sensors, and FDA-approved ECG and SpO2 readings.
  • The ScanWatch Light offers a 30-day battery life and basic heart rate and sleep tracking.
  • The ScanWatch 2 and Light cost $349 and $249, respectively, and are available for pre-order now with an October 2023 release date.

Withings, the company best known for its smart scales, watches, and health monitoring tech, is releasing two new hybrid smartwatches: the Withings ScanWatch 2 and ScanWatch Light.

Withings' latest hybrid smartwatches go all-in on health tracking, with new features that even the Galaxy Watch 6 and Fitbit Sense 2 don't offer. Most intriguingly, the ScanWatch 2 uses the "TempTech24/7 module." It combines the usual PPG and accelerometer with "thermistor" and "heat flux" sensors. One measures ambient and skin temperature, and the other measures energy transit. 

Unlike Samsung and Apple, which primarily use their temperature sensors for menstrual cycle tracking and not for health data, Withings promises 24/7 temperature data to spot warning signs for illnesses based on graphs of your temperature baseline. It'll also point out overheating or cooldown times during a workout, including "workout temperature variation zones."

Similarly, whereas most fitness brands say that their blood oxygen data is just an estimate that shouldn't be used for health data, the Withings ScanWatch 2 is "FDA cleared" for both SpO2 checks and AFib detection of irregular heartbeats. 

In terms of overall health tracking, the Withings ScanWatch 2 has a MultiWave PPG Sensor that uses four wavelengths and 16 PPG channels, increasing the range of pulse data collected from your skin. Most other fitness smartwatch brands don't advertise their numbers, but most seem to use only two or three wavelengths (red, green, and/or IR).

Photo of the Withings ScanWatch Light on someone's wrist

(Image credit: Withings)

As a hybrid smartwatch, the ScanWatch models have a 0.63-inch grayscale OLED circle on a portion of the watch face, with the rest of the watch taken up by a traditional analog watch design. You'll use the rotating crown to navigate through health data, but the watch is mostly designed to work automatically; you'll mainly use the Withings app to check your health data. 

Both the ScanWatch 2 and ScanWatch Light last 30 days per charge and measure heart rate variability, respiratory rates, heart rate zones during workouts, and menstrual cycles. They have stainless steel casings for a premium look and 5ATM water resistance. Unfortunately, neither has built-in GPS tracking, relying on connected GPS.

In terms of what makes the ScanWatch 2 more advanced and expensive, the ScanWatch Light doesn't measure blood oxygen, body temperature, irregular heart rhythm, or elevation. The ScanWatch 2 also has more durable Sapphire Glass for the display, compared to the ScanWatch Light's Gorilla Glass.

Both new Withings ScanWatch models launch in October 2023 and can be preordered now from Withings' website. The ScanWatch 2 ships in 42mm and 38mm sizes for $349.99 and comes in Silver Black, Silver White, Rose Gold Sand, and Rose Gold Blue. The ScanWatch Light only has a 37mm size and sports finishes in Silver Black, Silver White, Rose Gold Sand, Light Blue, and Light Green.

Michael L Hicks
Senior Editor, VR/AR and fitness

Michael is Android Central's resident expert on fitness tech and wearables, with an enthusiast's love of VR tech on the side. After years freelancing for Techradar, Wareable, Windows Central, Digital Trends, and other sites on a variety of tech topics, AC has given him the chance to really dive into the topics he's passionate about. He's also a semi-reformed Apple-to-Android user who loves D&D, Star Wars, and Lord of the Rings.

For wearables, Michael has tested dozens of smartwatches from Garmin, Fitbit, Samsung, Apple, COROS, Polar, Amazfit, and other brands, and will always focus on recommending the best product over the best brand. He's also completed marathons like NYC, SF, Marine Corps, Big Sur, and California International — though he's still trying to break that 4-hour barrier.