This was announced by the Cupertino company in the classified section of your web developer. As of February 1, 2014 all apps submitted for review, either new or updates existing software, must have been developed with the latest version of Xcode 5 to be optimized for iOS 7.
Apple has deadline for developers to optimize all applications for iOS iTunes 7. On February 1 all apps in the Apple store known transparencies should incorporate the new operating system as well as the full screen option and spot colors.
To meet the demands of Apple, developers will have to follow the directions in the documentation that Apple released to upgrade your operating system. These steps apply to the design, icons, navigational elements, menus and other details.
Applications continue to use the aesthetics of iOS 6 that are sent to the Apple store might not have the approval of the company and not be published.