1. On the iPhone's lock screen, touch and hold anywhere on the display until you see the Customize button. You'll need to ...

On Windows 11, head to Settings > Personalization > Colors and set Choose your mode to Dark. On macOS, click the Apple menu, then System Settings > Appearance > Dark.

In order to change the time on your Fitbit, first change the time on the device it's paired with and then re-sync your ...