Firm date? No, however Fitbit CEO said this on Wed Nov 1 (google "Fitbit q3 2017 earnings call transcript" if you want to read it for yourself):
""Before the holiday selling season, we’re going to have a full-blown launch of the Fitbit app gallery"
In the US, Thanksgiving or Black Friday has been the beginning of the holiday selling season (although its getting earlier). Going by that logic, we should see the full-blown launch of the app gallery by November 23.
Aria, Fitbit MobileTrack on iOS. Previous: Flex, Force, Surge, Blaze