What topics are in the content of this guide app* How to charge and setup your Fitbit device?* How to change clock face?( You can save up to 5 watch faces to switch between the Ionic and Versa series.)* How do Fitbit devices sync their data?* How to wear fitbit charge 4 ( During a workout, experiment with wearing your tracker a bit higher on your wrist for an improved fit.)* How to navigate Fitbit device?* How to manage alarms?* How to set up notifications* How to update, restart and erase fitbit charge 4?Note: This mobile application is a guide. It is not an official app or part of an official app product.