Microsoft achieve a basic milestone. In windows phone’s app store the apps number has reached up to 300 thousands. But development of apps IOS and Android Microsoft is still far behind. And if Microsoft wants to become at level of Apple, so it should work hard. Because in Apple store the number of apps are more than 1-2 million. Secretary of Microsoft said “Today in Microsoft store there are more than 300k apps and increasing day by day”. From Microsoft numbers of that App has hopefully been increased who are being used by Desktop and Mobile Operating System at a time.