Recent Microsoft apps for both Windows Phone and recent previews of Windows 10 have increasingly featured the 'hamburger' menu on the top left for navigation, rather than the hubs, pivots, tabs and app bars of the Windows 8 and Windows Phone design style. There was speculation that Microsoft was giving up on the look it originally called Metro and hoping to appeal to iOS and Android users with a more familiar interface. But at the recent Build conference the message was more that Windows 10 design is a work in progress, and that hamburger menus are only a small part of it, intended for some very specific scenarios.