Metro apps are an important addition to Microsoft Windows 8, providing the cornerstone for a single, consistent programming and interaction model across desktops, tablets, and smartphones. The Metro app user experience is very different from previous generations of Windows applications: Metro-style apps are full-screen and favor a usability style that is simple, direct, and free from distractions. Metro apps represent a complete departure from previous versions of Windows. There are entirely new APIs, new interaction controls, and a very different approach to managing the life cycle of applications
