Similar to the way Windows 8 overhauled the traditional desktop OS for the mobile era, SharePoint 2013 acknowledges that many users expect to be able to use their desktop applications on any device, no matter how big or small the screen. Users now can pick from three different mobile browsing options. These include an HTML5-based "contemporary" view, which optimizes for various screen sizes across iOS, Android and Windows Phone devices. Unlike prior versions, SharePoint 2013 also enables developers and administrators to deliver customizable, device-specific designs rather than a one-size-fits-all experience. Geolocation and push notification functionality also has been added.