A web app is a program built to perform specific tasks, and it uses web browsers like Chrome, Firefox, Opera, etc. as its clients. The advantage of using a web browser as a client is that the developer doesn’t need to develop specific versions of the program for different operating systems. How Is A Web Application Developed? First of all, you need to define the purpose the web app is going to serve for your business. You need to understand who is going to use your web app and what problem your app is going to solve for them.