Application development is defined as the development and maintenance of software running on different types of computers. It refers to websites developed for mobile and computer devices. It refers to the development of applications used on mobile devices and customized development of desktop client software.

As a newer, more advanced and more popular platform for mobile application development and mobile web page development, HTML5 has built a user experience and interface, greatly improving the overall user experience from the perspective of creating mobile applications and mobile web page development. HTML5 is the framework of choice now, because it provides users with a highly interactive experience, and can greatly improve the company's large-scale online image, which is largely dependent on mobile technology. HTML5 is also currently used on all major browsers, such as Chrome, IE, FireFox, Safari, and Opera.

Web applications are not these things. Web application developers use only Web technologies. However, Web applications focus on user interaction, just like mobile applications, which are basically different from traditional websites