Previously, it also offered Google Hardware devices for users to purchase. Google play is also a digital media store, where it offers music, books, magazines and TV Programs. Google Play is also the official application store for the Android Operating System and it allows users to browse and download apps developed using the Android SDK and are published through Google. Since Android and Chrome OS belong to Google, they cater and offer all applications to the users. In iOS and the web, it excludes some applications while on Roku the user can only watch movies. It works on platforms like Android, Chrome OS, iOS, the web, and Roku.