No. Since September 30, 2026, Fitbit can no longer be connected directly to Fddb — neither in the Fddb app nor on the Fddb website. Google has discontinued the previous Fitbit interface; Fitbit is now called Google Health.
You can still import your data from Google Health into the Fddb app, though: on iOS via Apple Health, on Android via Health Connect.
To learn how to switch and what happens to your previously imported data, see The Fitbit connection has been discontinued. What can I do?