Current versions of Visual Studio provide a universal Windows app template that lets you create a Windows Store app (for PCs, tablets, and laptops) and a Windows Phone Store app in the same project. When your work is finished, you can produce app packages for the Windows Store and Windows Phone Store with a single action to get your app out to customers on any Windows device.
The Universal Windows apps template lets you easily create a Windows Store app and a Windows Phone Store app from a single project.