12/24hr clock preference is set from your Fitbit account settings: https://www.fitbit.com/user/profile/edit

This clockface is free if you already purchased our Gaming Bundle. Otherwise this is a paid clockface. After a FREE 3 hour 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