There are no setup instructions included in the Fitbit Flex pakaging; rather, the entire setup is conducted through a Fitbit app. There are different app versions available for iOS and Android that can be downloaded from Fitbit's website. Users may also conduct setup through a computer by going to Fitbit.com.
Users need to setup a Flex account for recording activity statistics. When a user sets up a new account, he is guided through the setup process for the new device. A brief tutorial demonstrates various aspects of the tracker and helps the user confirm the device is charged and ready for use.