I believe for beginners who are stepping into mobile web development, creating a full screen mobile web app and hiding the address or the URL bar of the mobile browser can be a little irritating and kind of mystified at times. In this tutorial I will discuss how to build a full screen mobile web app using pure javascript, html/html5 and css/css3. I will not be using Sencha Touch or any other mobile web frameworks here. Before reading through, check out the demo app in an iPod or an iPhone and notice how the URL bar gets hidden to reveal more of the viewport.