Withings Pulse O2 Activity Review: Not Just An Ordinary Fitness Tracker

The Pulse O2 from Withings: What's so special about it?

The Pulse O2 from Withings: What’s so special about it?

The major concern perhaps of most people nowadays about several fitness trackers is the accuracy and speed of the existing gadgets that are out in the market in the status quo. Apparently, most trackers look good at start or that they may seem responsive during the unboxing but they become ultimately unreliable in the near future. That is what we stressed on our next reviews, and one of the machines that will be subjected to this new standard would be the Withings Pulse O2 activity tracker. Read on to know the advantages and disadvantages of this new gadget.

Major Features

We would want to be straight to the point right on the onset. What are the things that this gadget can offer and measure in the end? Just like other fitness trackers, the Pulse O2 can measure the following:

  • Steps taken
  • Elevation climbed actively
  • Distance travelled
  • Calories burned
  • Run: daily recap of duration and distance
  • Instant heart rate
  • Blood oxygen level (SpO2)
  • Sleep duration and quality
  • Light vs. deep sleep
  • Sleep interruptions


Looking at these features may look so generic on the first hand however, looking closely, you’d realize that this gadget has a major difference with other fitness trackers. True it measures the steps taken, distance travelled and calories burned but the thing with it is that it measures along it the altitude or elevation that you have undegone. So for example, you are climbing a mountain or running on a steep track- obviously these activities do burn more calories than just on plain leveled surfaces due to the force of gravity- the Pulse O2 can measure the calories burned accurately then compared to other gadgets which would just treat your activity as a normal running or walking activity.

Another innovation is the instant heart rate. While some gadgets may require a few seconds to measure the pulse in your wrist, Pulse O2 can measure yours with literally just using your fingertips. It instantly displays your heart rate, making readings more accurate. It also detects any abnormal heart or pulse rate during your sleep, hence distinguishing whether what you’ve had was a light or deep sleep. It also records the interruptions during your sleep.

Lastly, it also has an option to measure your SpO2, that is your blood oxygen level. This is the main feature of this gadget. By measuring your pulse and breathing, it can calculate for the saturation and level of oxygen dissolved in your blood. Hence, you can be adviced whether to halt an activity or that you might be suffering from lack of oxygen. This feature is quite advanced, making the Pulse O2 a rising choice among mountain climbers and athletes.

Accuracy and Efficiency

However is it accurate? In order to measure its accuracy, we manually counted our footsteps and heart rate and compared it to the gadget’s results. After three trials, the gadget returned values with less than 5% margin of error, hence making it strikingly accurate compared to other gadgets. We also tried using the machine on both wrists, at different times of the day and at different conditions- as expected the margin of error is negligible.

Price and Conclusion

There aren’t so much fitness trackers in the market today that are really built well and good. Not only has the Pulse O2 exceeded our expectations, it has also brought about a strikingly high level of accuracy. Also, its price is around $150, making it affordable and just as the same price as other entry-level gadgets. We recommend this gadget for those people who are quite advanced when it comes to measuring their fitness level.