Zune software is used to manage and sync content on Windows Phone 7 devices with PCs. Windows Phone 7 can wirelessly sync with the software. In addition to accessing Windows Phone devices, Zune software can also access the Zune Marketplace to purchase music, videos, and apps for Windows Phone and Zune products. While music and videos are both stored locally on the PC and the phone, apps are only stored on the phone even if purchased from the Zune software. Zune software is also used to deliver software updates to all Windows Phone 7 devices.