Fitbit rolling out Charge 4 update with on-device SpO2 level

March 3, 2021

Fitbit announced the Charge 4 this month last year as its most advanced fitness tracker with built-in GPS and SpO2. Data from the latter sensor was previously only accessible in the Fitbit app, but users will soon be able to see the metric on-device.

As previously announced, firmware version 1.100.34 for the Charge 4 started rolling out yesterday. Fitbit notes two changes in the changelog:

Your Fitbit device can now estimate your blood oxygen saturation (SpO2) while you sleep. For more information, see How do I track blood oxygen saturation (SpO2) with my Fitbit device?
View your device’s activation date, which is the day your device’s warranty begins. The activation date is the day you set up your device.

When the Charge 4 launched last year, the only SpO2 data you could see was in the mobile app. An “Estimated Oxygen Variation” graph showed high and low variations as part of the broader sleep menu. Towards the end of 2020, Fitbit smartwatches (Ionic, Versa 2/3, and Sense) were updated to show average SpO2 level and range.

Following this week’s update, the capability will be available on Fitbit’s premier tracker as a new SpO2 app. After a night’s sleep, swipe up from the clock face until you see an SpO2 tile displayed alongside other stats.

It may take around an hour for your SpO2 values to appear after you wake up. The SpO2 tile shows data for your most recent sleep session. If your sleep session is split into 2 separate logs or you take a long nap, the tile updates to show data for the most recent sleep session.

Version 1.100.34 is not yet widely available and still rolling out in phases. When it’s available for your Charge 4, a banner will appear at the top of Fitbit’s Android and iOS application.

More about Fitbit:

Author: Abner Li
Source: 9TO5Google

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