The Fitbit OS 5.1 software update delivers enhanced features for the Sense and Versa 3smartwatches.

This update provides more ways to track SpO2 so users can better manage their wellbeing and delivers enhanced on-device voice-enabled capabilities with Bluetooth calling.

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Constant SpO2 monitoring

For Premium markets, Fitbit has enhanced its SpO2 experience, enabling Sense and Versa 3 Premium members to track blood oxygen levels while sleeping and see their average in the Fitbit app without using a specific SpO2 clock face.

Looking at your SpO2 trends in the Health Metrics dashboard may help you see when there are important changes in your fitness and wellness, like increased stress or fatigue, or signs of respiratory issues or changes in your environment, such as altitude or air quality.

By tracking your SpO2 levels over time, you can see when there may be important changes in your fitness and wellness.

For those who prefer to see their nightly SpO2 levels at a glance on their wrist, Fitbit still has its free signature SpO2 clock face. The company will offer seven additional new SpO2 clock faces in the app gallery by the end of the year. Since its launch in September, Fitbit’s signature SpO2 clock face has more than one million downloads from the Fitbit app gallery.

READ MORE: Updated Fitbit Versa 3 gives users more features

Bluetooth Calling

With both Sense and Versa 3, you’ll also be able to take hands-free Bluetooth calls with the on-device microphone and speakers, send incoming calls to voicemail and control volume without reaching for a phone. AndroidTM users can also respond to text messages on-the-go with voice-to-text commands.

READ MORE: Fitbit reveals its most advanced health smartwatch – the Sense


The Fitbit Sense and Fitbit Versa 3 are available on and in selected Dis-Chem stores.