From Windows Phone 8.1 OS, Microsoft introduces an important change in the Windows Phone developer ecosystem is called universal APP concept. In this release, Windows Phone converges with the Windows Store APPS PLATFORM into a single developer platform that runs the same types of apps i.e Windows RUNTIME apps. Windows Phone and Windows Store app developer platforms truly have become ONE, single development platform.

In single world, Universal app is a single development platform for windows phone and windows store apps.

From Windows Phone 8.1 OS, Microsoft introduces an important change in the Windows Phone developer ecosystem is called universal app concept. In this release, Windows Phone converges with the Windows Store apps platform into a single developer platform that runs the same types of apps i.e Windows Runtime apps. Windows Phone and Windows Store app developer platforms truly have become one, single development platform.

In single world, Universal app is a single development platform for windows phone and windows store apps.