Using a browser interface, a web application (web app) is an application programme that is kept on a remote server and made accessible over the Internet. Although many websites use web applications, not all do; by definition, web services are web applications. Web applications can be created for a wide range of purposes and used by anyone, whether an individual or an organisation, for a wide range of purposes. Online calculators, web-based email, and online stores are examples of web applications that are frequently used. While some of them might only be available through a specific browser, the majority are accessible without it. DesignLab brings you this article, explaining how to build apps and websites step by step.