None of these devices runs Wear OS, since they were probably already in development when Google's acquisition of Fitbit happened.

That also provides you with the most detailed sleep tracking, and the Daily Readiness Score which lets you know 'when to push hard or take a rest day', and it looks like Fitbit has no plans to scrap the paid subscription. Alongside the Versa 4, it has 40 exercise modes (double the previous number), GPS, and more than 1,000 workouts and mindfulness sessions hidden behind the Fitbit Premium paywall. This can make you aware of potential stress triggers and create a stress management routine that builds resilience over time. Compared to its predecessor, the Sense 2 gets all-day stress management thanks to its new continuous EDA sensor. The theme pretty much continues on the inside as well. Well, unless you count the physical button replacing the capacitive one from last year. The Google-owned company chose to subtly evolve the designs of the Versa 4 and Sense 2, opting to eschew any revolutionary changes this year in that department. Today Fitbit has officially introduced its 'fall lineup', refreshing its two most high-end smartwatches alongside the Inspire 3 fitness tracker.

Versa 3 vs versa 4