Fitbit is already working on the "Charge 6" and Google's next fitness tracker looks identical to the Charge 5
Fitbit Charge 6 vs Charge 5 (10 Major Differences)
Sources: Pixel Watch is powered by a 300mAh battery and offers cellular connectivity : r/Android
Fitbit Charge 6: Rumors Point to a New Button and Google Apps Support
Upcoming Fitbit Charge 6 is rumored to be similar to its predecessor
Fitbit Charge 6 gets physical button, Music, Google Maps
Fitbit's rumoured Charge 6 reportedly will look like the Charge 5
Fitbit Charge 6: Rumors Point to a New Button and Google Apps Support
Possible Fitbit Charge 5 images surface codenamed 'Morgan' - Wareable
Fitbit Charge 6 may finally be coming, and I love the list of improvements
Pixel Watch appears to have the same health sensors as Fitbit Charge 5 : r/WearOS
Fitbit Irregular Heart Rhythm Notifications smartwatch feature launches in over 20 countries - News