In an age where everyone is carrying a smart phone, it is of utmost importance to make efficient use of the upcoming technologies. This indicates the rise in number of applications being created for mobile devices. As a result, mobile user interface designing has become a significant part of application designing. There has been an increasing number of devices today providing powerful graphics capabilities helping users to deal with huge amount of information. However, the prototyping tools currently being used in the industry are lacking features and are not addressing some of the prime issues like user friendliness, functionalities, representation, and enforcement. This chapter presents a tool based on an analysis of different popular prototyping tools in the industry which will overcome some or all of the major issues faced by application designers. The authors describe the prototyping tool's concept, design, features, as well as how it is suitable for making great user interfaces helping application designers to design exactly what they want.