Cardstock is an icon pack for replacement launchers such as Nova, Apex, ADW, Holo and Holo HD. The icons are flat, minimal, and elegant in design. Features. Themes icons on your phone. Built in wallpaper chooser with 13 wallpapers to choose from. Circle me on Google Plus, and join our awesome community. Request an icon. Email me in-app. Share the theme with friends via email.