Responsive Web Design (RWD) is clearly the talk of the internet right now and be it developers or clients or users, everyone is looking forward to its implementation so that the user experience is improved. Because of this flurry, there has been a new development now and this angle hasn’t been explored much. This side of RWD is RWA or Responsive Web Apps. Responsive Web Apps clearly have a huge future in the internet industry and because they are being taken as a challenge, not many people discuss the required concepts which you need to build these apps. Actually building the apps come later as first we need to be clear about these concepts in our minds and then go forward with the tutorials available for RWAs. This article will talk about the pre-requisites of developing Responsive Web Design Apps and the challenges and ideas which everyone needs to know before they begin the development process.