https://arstechnica.com/gadgets/2022/09/google-will-start-assimilating-fitbit-accounts-next-year/

Google's acquisition of Fitbit closed in early 2021, but we haven't seen much in the way of changes yet. 9to5Google spotted a big upcoming change posted on Fitbit's help site: account migrations! A new Fitbit help page has outlined the plan for the coming Google account migration. If this goes anything like the Nest account migrations (done by the same Google Hardware division), Fitbit users are in for a wild ride.

Google's support page says, "We plan to enable use of Fitbit with a Google account sometime in 2023" and that at that point "some uses of Fitbit will require a Google account, including to sign up for Fitbit or activate newly released Fitbit devices and features." That means optional account migrations for existing users in 2023. Google also says, "Support of Fitbit accounts will continue until at least early 2025. After support of Fitbit accounts ends, a Google account will be required to use Fitbit. We'll be transparent with our customers about the timeline for ending Fitbit accounts through notices within the Fitbit app, by email, and in help articles."