"Custom watchfaces" refers to the ability to personalize the appearance of a smartwatch's display by choosing different designs, themes, or styles. Full definition
They both also have a slew of custom watchfaces to complement the styling of the bodies. (androidcentral.com)
Here will soon start a platform for custom watchface sharing. (wearfaces.com)
Pebble has been improving its platform quite a bit since its first model launched in the beginning of 2013, and there is now an app store to install custom watchfaces and apps that let you do things like check in on Foursquare or buy a coffee at Starbucks. (theverge.com)