Use quick replies to send customized responses to text messages and messages from certain apps with Fitbit Charge 3, Fitbit Charge 4, Fitbit Charge 5, Fitbit Inspire 3, Fitbit Ionic, Fitbit Luxe, Fitbit Sense series, or Fitbit Versa series. This feature is currently available on devices paired to an Android phone . Devices paired to an iPhone can respond to Fitbit app notifications, such as messages, cheers, taunts, and friend requests.