Fitbit

We haven't received many problem reports for Fitbit yet.
If Fitbit is down for you, you might be one of the first to encounter an outage - please consider checking back later. It's also possible that the issue is local or related to your internal network or system.

Fitbit reports

Fitbit offers a fitness platform. When Fitbit is down, users may be unable to upload and view new activities, login isn't working or they get general error messages such as server connection error.

Reports about problems with Fitbit

Sync is acting like it's working but none of the metrics are updating.
Sync is working for me on my Sense now, even though the status board still says no. Numbers are back as they should be. For those folks that reset and got locked out, search for further help.
Got everything back, sleep, steps, exercise map. I did NOT follow the general advice (force stop, reinstall, whatever), learned that the hard way last time. Check Down Detector FIRST.
Yeah. Same. On the app I had 2900 steps but oddly, on my Fitbit it read 106. It did actually synch again. Hopefully it will do the same for you. But yeah, I'm moving to another vendor as well. The icing on the cake was Google Health turning off comments on all their socials and not even posting an update.
I just "successfully" synced for the first time this morning, and it zeroed out 4,900+ steps I've already done. Google has made a mess of Fitbit. I'll be changing to a different vendor.
Have been getting the “500” error notice since about 630am on the app. My tracker is tracking steps,azm,heart etc. but the app will only display my steps,☹️ Chat gpt told me the issue was on Googles end and not to try a manual restart etc. 👍
Now the app and my charge 6 say I have 13,401 steps! The problem is I have 6792 steps on my fitbit before the error sycning.
Same! Steps and battery life,ugh