In a small percentage of cases, users signed up for Fitbit accounts or logged into an old account not associated with a device. Ideally, there should be some way of detecting whether the user has a valid account and developing more advanced exclusion criteria (e.g. exclude mobile-app only use, or those who signed up for an account too recently)
In a small percentage of cases, users signed up for Fitbit accounts or logged into an old account not associated with a device. Ideally, there should be some way of detecting whether the user has a valid account and developing more advanced exclusion criteria (e.g. exclude mobile-app only use, or those who signed up for an account too recently)