The process of mobile app development is the creation of application or  software that are intended to run on any mobile devices and optimized to take advantage of that product’s unique features and hardware. There are multiple ways the applications can be pre-installed on phones  either via manufacturing platforms that is when the phones are getting assembled , or delivered as web applications to provide an “application-like” experience within a web browser. The major part of the mobile app development process, is mobile user interface design or the UI which is also most essential in the creation of mobile apps. Following are the things play a major role for mobile user interface(UI) considers constraints, contexts, screen, input, and mobility as outlines for the design . The user is often in main focus of interaction with their device, and the interface entails components of both hardware and software. Mobile UIs, or front-ends, rely on mobile back-ends to support access to enterprise systems.