We’re currently working on plans to offer direct integrations with devices such as Fitbit & Garmin watches, Oura rings, and apps such as Samsung Health.
BUT In the meantime, we can give you some instructions as to how to link some of these to Google Fit and Apple Health:
For Android & iPhone
You can now sync a number of health metrics directly from Fitbit, including; Resting Heart Rate (RHR), Heart Rate Variability (HRV), Sleep, Steps, and weight.
To sync any of these metrics from Fitbit: