To enable step tracking, go to the “Home” tab in your Carrot app, and tap the “Enable Steps” button. Since you will be tracking through your Fitbit device, select “Step Tracking with Fitbit”.
If you already have Steps enabled on your phone, you will need to go to your "Accounts" tab and click on “Manage Devices”. There, you will see options for tracking steps. Make sure you click on Fitbit and have your Fitbit login information on hand, as the next screen will ask you to enter your information. Once you’ve logged into your Fitbit account, click “activity and exercise” and the “allow” button. You should be all set up!