on competing storefronts such as Steam. The new Xbox app subsequently became the main frontend for PC games available via Microsoft Store, and also integrates subscription service PC Game Pass. Movies and TV shows Movies and television shows are available for purchase or rental, depending on availability. Content can be played on the Microsoft Movies & TV app (available for Windows 10, Xbox One, Xbox 360 and Xbox X/S), or Xbox Video app (available for Windows 8/RT PCs and tablets, and Windows Phone 8). In the United States, a Microsoft account can be linked to the Movies Anywhere digital locker service (separate registration required), which allows purchased content to be played on other platforms (e.g. MacOS, Android, iOS). Microsoft Movies & TV is currently available in the following 21 countries: Australia, Austria, Belgium, Brazil, Canada, Denmark, Finland, France, Germany, Ireland, Italy, Japan, Mexico, Netherlands, New Zealand, Norway, Spain, Sweden, Switzerland, the United States, and the United Kingdom. The purchase of TV shows is not currently supported in Belgium. Former features Music On October 2, 2017, Microsoft announced that the sale of digital music on the Microsoft Store would cease on December 31 after the discontinuation of Groove Music Pass. Users were able to transfer their music to Spotify until January 31, 2018. Books Books bought from the Microsoft Store were formerly accessible on the EdgeHTML-based Microsoft Edge. The ability to open ePub e-books was removed during the shift to the Chromium-based Microsoft Edge. On April 2, 2019, Microsoft announced that the sale of e-books on the Microsoft Store had ceased. Due to DRM licenses that would not be renewed, all books became inaccessible by July 2019, and Microsoft automatically refunded all users that had purchased books via the service. Guidelines and developers Similar to Windows Phone Store, Microsoft Store is regulated by Microsoft. Applicants must obtain Microsoft's approval before their app becomes available on the store. These apps may not contain, support or approve, gratuitous profanity, obscenity, pornography, discrimination, defamation, or politically offensive content. They may also not contain contents that are forbidden by or offensive to the jurisdiction, religion or norms of the target market. They may also not encourage, facilitate or glamorize violence, drugs, tobacco, alcohol and weapons. Video game console emulators that are "primarily gaming experiences or target Xbox One" and third-party web browsers that use their own layout engines, are prohibited on Microsoft Store. Microsoft has