Mobile Apps are taking over,but what are they really? How does the addition of an app change the productivity of a device instantaneously? Convergence is the short answer. But to really define an app and the magic that it performs, a discussion about Web Apps. Web applications use web documents written in a standard format such as HTML and JavaScript, which are supported by a variety of web browsers. Web applications can be considered as a specific variant of client-server software where the client software is downloaded to the client machine when visiting the relevant web page, using standard procedures such as HTTP. Client web software updates may happen each time the web page is visited. During the session, the web browser interprets and displays the pages, and acts as the universal client for any web application.