Mobile application development is the process by which  is  for low-power , such as ,  or . These applications can be  on phones during manufacturing, downloaded by customers from various , or delivered as web applications using server-side or client-side processing (e.g. JavaScript) to provide an “application-like” experience within a . Application software developers also have to consider a lengthy array of screen sizes, hardware specifications and configurations because of intense competition in mobile software and changes within each of the platforms. Mobile app development has been steadily growing, both in terms of revenues and jobs created.