Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more
All you need to do is sync it one last time. Then turn it over to the person. Once they set it up it will clear all your data and start new for them.
Wendy | CA | Moto G6 Android
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Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more
You can't factory reset the blaze but this should not be an issue. All your personal data is held on the fitbit servers rather than the fitbit itself. The fitbit will have just your steps etc since the last sync.
When your friend sets up a fitbit account and adds your fitbit as a new device then it will delete any tracking data left on it and reassign it to their account.
At no point will they have any access to your personal data.