Web development is the process of building and maintaining websites. It involves designing, coding, testing, and maintaining the website to ensure it functions properly.
App development creates software applications for mobile devices such as smartphones and tablets. It involves designing, coding, testing, and publishing the app to the respective app stores.
Web development programming languages include HTML, CSS, JavaScript, PHP, Python, and Ruby.
App development languages include Java, Swift, Kotlin, and Objective-C.
Websites are accessed through a web browser on a computer or mobile device. An app is a standalone software application downloaded and installed on a mobile device.
The time it takes to develop a website or app depends on the complexity and scope of the project. It also depends on the availability of resources and a development team. A simple website may take a few weeks to develop, while a complex app can require several months.