In the world of mobile applications graphical user interface plays a very important role. The UI is the only thing which the user who has no Computer Science background sees on the screen. In this regard the theme of the application plays a very important role. An interactive application is considered a good application. If the interface of the application is user friendly and easy to understand and use the user will like it. Two things play a very important role in the Human Computer Interaction, the application should be easy to use and easy to learn and these two can be easy achieved by using good UI themes.