Fitbit OS 5.0 Brings New UI and Navigation to Versa 3 and Fitbit Sense
 

You can buy the new Fitbit Versa 3 and Sense smartwatches right now, but heads up when you do—if you’re upgrading, you’re going to have to relearn how to use a Fitbit. The two smartwatches come preloaded with Fitbit 5.0, a new OS with an overhauled navigation and UI.

https://www.reviewgeek.com/55156/fit...-fitbit-sense/