A:Answer Hi, Tony. To set up and use the Fitbit Sense, you must install the Fitbit app. The Fitbit app is free, and you don't need to pay for a premium subscription to use it. For more information, please visit this: https://support.google.com/fitbit/answer/14237011
For any additional questions and concerns, reach us at: https://goo.gle/contactfitbit