A mobile website is similar to any other website in that it consists of browser-based HTML pages that are linked together and accessed through a web browser. A mobile website from is designed for the smaller handheld display and touch-screen interface. Like any website, mobile websites can display text content, data, images and video. They can also access mobile-specific features such as click-to-call (to dial a phone number) or location-based mapping.
Apps are actual applications that are downloaded and installed on your mobile device, rather than being rendered within a browser. Usually these apps are cataloged and downloadable from Apple’s App Store and Android Market. The app may pull content and data from the Internet, in similar fashion to a website, or it may download the content so that it can be accessed without an Internet connection