A web application is basically a software application program that applies web-based technologies to perform specific tasks. The application is built with various web technologies that include HTML, JS, CSS helpful storing databases, files etc. It is generally used by a team or a user for performing different tasks over the internet.
Web apps can be accessed via a web browser such as Google Chrome and involve a login/sign-up mechanism.
The main difference between web applications and websites is how we interact with each of them. Web applications are usually defined by their input. We can read, create, and delete data within a web application. Websites are generally defined by the output that they provide and that includes the news, the product information, the FAQs that we can read on the website.
Any application that can be run on a mobile device like a tablet or a smartphone by providing service to its users can be categorized as a mobile application.
Mobile applications are exclusively designed for mobile gadgets and are suitable for iOS, Android, and Cross-platform operating systems. Most of the mobile apps like Google Maps, Uber, Amazon Kindle, etc., work offline too. When it comes to web apps, they function only if you have internet connectivity. A web app only functions in real-time in a web browser that has CPU resources. A mobile app is downloadable from an app store as long as one has adequate internal storage.
All web applications can be built to provide a customized experience to their users, but custom web applications are totally focused on serving a particular market, enterprise, or audience needs. When developing a custom web application, the total focus is on learning the various needs, utilizing the right technology that best fits in, and developing a tailored solution that addresses specific issues.