Mobile application development deals only with building an application for mobile phones like smartphones and tablets. Each stage of the process consists of planning, design, coding, testing, and then deployment. Special features of the devices like accelerometers or temperature sensors must be incorporated into the design to enhance the functionality of the application. During development of the mobile application, special tools and environments are very much needed to ensure compatibility across different devices and operating systems. Mobile app development emphasizes UI design in a way that it is passing user approach. Considering how fast mobile technology evolves, a constant learning on the new trends and best practice is crucial and fundamental to successful app development.