Withings Pulse O2

The Withings Pulse O2 is a wearable fitness tracker with a different look and design to it with its removable base that allows for multiple wearing options: strap it on your wrist, clip it to your belt or even slip it into your pocket. It tracks the basics, and adds in elevation, heartrate monitoring, and estimates SpO2 levels (how much oxygen you have in your blood). One issue to note is that you have to remove the device from the band to read your heartrate and oxygen, which is not easily done during a workout. Testers also noted that the screen is difficult to read in the sunlight. This Withings fitness tracker holds a charge for close to two weeks, longer than many others that last around five days. 

Tester Comment: “I loved how this fitness tracker logged activity throughout the day -- it automatically caught different levels of activity. I found the Pulse 2 to be very accurate as well; it reported pretty much exactly what the treadmill said, which is obviously great news. The only downside with its heartrate tracking is you have to remove the device from the band, which can be a hassle and not something you want to attempt while running.”

Key Attribute: Accuracy

Best For: Distance runners who want accurate tracking, biometrics and wearable options