No if you go on their site you will understand, they mix a launcher (nova, apex,buzz) ,some widgets (zooper,uccw and others) and wallpapers to obtain beautiful results, and then share the tutorial and resource, for example <a href="http://mycolorscreen.com/2013/09/06/flat-os-2/">http://mycolorscreen.com/2013/09/06/flat-os-2/</a> , I think the app will just apply this easily