Note: For more information about setting up Fitbit Ace or Fitbit Ace 2, see How do I set up Fitbit Ace devices? Requirements. To set up Fitbit Aria Air, Fitbit Charge 4, Fitbit Sense, Fitbit Versa 2, or Fitbit Versa 3, you must use a compatible iPhone, iPad, or Android phone. You can’t set up these devices on a Windows 10 device.