The Fitbit Sense and Versa 3 have received some exciting upgrades, thanks to a new software update. The update brings the Google Assistant to the two smartwatches, along with improvements to the SpO2 sensor, among other changes. Fitbit OS 5.1 is rolling out now in the US.
https://www.notebookcheck.net/Fitbit-Sense-and-Versa-3-smartwatches-receive-Google-Assistant-support-SpO2-upgrade-and-more-courtesy-of-new-software-update.505225.0.html