01-18-2016 19:35
01-18-2016 19:35
01-19-2016 07:28
01-19-2016 07:28
Welcome to the forums @gjb270162! I'll be flad to help on this.
As you've mentioned, you are running the latest version for the Fitbit App for iOS and your overall iOS is on its latest version. In this case I recommend to log out of the Fitbit App, restart your phone and log back in. This should clear any errors on your phone and app that may be causing the food logging feature to be inactive.
Nevertheless, if this doesn't work please attach a screenshot and I'll be glad to look further into this.
Let me know if you have any questions, good luck!