This app was mentioned in 1 comment, with an average of 1.00 upvote
To install apps from the android store on the band:
Download the app from the google play store (or other means) on to your phone
Open the app you just downloaded on your phone.
The app should prompt you to install a new tile on your phone
I do not know of any apps that allow you to customize the fonts, but there is one that allows you to select any image as a wallpaper. Try this one.