Fitbit.anom -

: ".anom" is not a standard file extension for Fitbit devices (which usually use .TCX, .GPX, or .FIT). It could be a specific internal naming convention for a data export or a localized software bug.

: You may be looking for information on how Fitbit handles data privacy or "anonymous" data logs for research. Fitbit.anom

If your interest is in how Fitbit manages your data privately: Fitbit.anom