Google Health no longer accepts sign-ins made with legacy Fitbit account credentials. Version 5.08 of the app has removed the option entirely, following years of warnings from Google that the change was coming.
The update went live this week on both Android and iOS. A Google Account is now required to use the app, since the Fitbit account migration period has ended. Anyone still relying on an old Fitbit login will need a Google Account instead.
This has been a long time coming. Google acquired Fitbit in 2021 and started warning users in 2022 that Google Account sign-in would eventually become mandatory.
What actually changed
The update notes for version 5.08 are sparse, but the headline change is straightforward: Google Account sign-in is now the only way in. The app also carries a warning attached to that shift. Data that was never migrated from a legacy Fitbit account to a Google Account will be deleted.
Trying to log in with old Fitbit credentials will now simply fail. There’s no fallback option or grace-period toggle buried in settings.
A second, smaller fix arrived in the same update. Google resolved a sign-up bug affecting users whose email address had previously been tied to a legacy Fitbit account, letting them sign up with their preferred Google Account regardless of that history. That’s a narrow fix, but a necessary one — without it, some users would have had no clean path into the app at all.
| Before version 5.08 | After version 5.08 | |
|---|---|---|
| Login method | Fitbit account or Google Account | Google Account only |
| Unmigrated data | Retained | Subject to deletion |
| Email conflict bug | Could block sign-up | Resolved |
| Platforms | Android, iOS | Android, iOS |
What this means for existing users
If you’ve already moved your data over, nothing changes in practice. The Google Account you use today is the same one you’ll use tomorrow.
For anyone who didn’t migrate, the situation is less forgiving. There’s no indication of a recovery window built into version 5.08 itself, and Google’s own language — data “will be deleted” — leaves little ambiguity about intent.
The rebrand context matters here too. The Fitbit app itself was renamed Google Health earlier this year, and the Fitbit name now survives mainly on hardware, including devices like the Fitbit Air. Software and account infrastructure are now fully Google’s; the Fitbit name is becoming a product label rather than a login system.
None of this directly affects Fitbit hardware functionality. Trackers and watches still sync and log data as before, as long as the account behind them is a Google Account.
The bigger question isn’t whether Google will keep phasing out Fitbit’s original identity — that process is effectively done on the login side. It’s how much of Fitbit’s software character survives inside Google Health as the app continues to evolve under Google’s branding.
