the Fitbit mobile app
Customize which information is displayed on two pages of stats which you toggle between by tapping the bottom half of the watch screen. Customize the colour and alignment of the stats and the time.
Your 12/24 hour clock and km/mi distance preference may be set on your Fitbit user profile settings: https://www.fitbit.com/user/profile/edit
After a 3 hour FREE trial you may choose to unlock the clock to continue using it. Thank you for your support, I couldn't keep doing this without your generosity! 😊
More from 45six - https://45six.com/Dev/Fitbit