With Microsoft's new operating system, Windows 8, a new type of applications were introduced, Windows Store Apps. These applications must meet certain requirements in order to be uploaded to Windows own store for apps. There are also guidelines to follow. The requirements and guidelines include appearance and functionality, such as a common search function in the applications to contribute to a more unified experience. How does these requirements and guidelines influence developers? Whether the development of the Windows Store Apps gets more difficult, or perhaps even simpler, is studied and evaluated in this report.