Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more
That may be ok. When fitbit calculates your calorie burn it takes into account your activity primarily based on your steps. It also includes those calories you burn just keeping your body alive (even when asleep). These are known as your BMR calories and they are calculated from your profile settings (age, height, weight etc) so if your husband is much bigger / heavier than you then his calorie burn rate will be higher.
Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more