After sending a message to Fitbit I was directed here. I have an Alta HR. Even though it has a heart rate monitor it is not compatable with the new zone challenge. It should be compatible with all devices.
Moderator edit: Clarified subject
not everyone can keep upgrading their devices. As a pensioner I cannot justify spending most of a weeks pension upgrading a device that works perfectly well.
Join us on the Community Forums!
Community Guidelines
Learn the Basics
Join the Community!
Not finding your answer on the Community Forums?
Go to the Help Site
Contact Support