Apple App Store will no longer accept new apps or app updates that access UDIDs

Apple App Store new Announcement-apps using UDIDs will no longer  accepted by the App Store effective May 1

Apple has informed app developers that App store no longer accept apps that acces unique device identifier (UDID -a 40-character code that uniquely identifies each device) after May 1 , more details.  The UDID codes very are important because using UUID developers can  track their applications and Mobile advertising networks also use the UDID codes for advertising purposes Apple requests developers use the new 'Vendor or Advertising identifiers'- introduced in iOS 6.

Must Support IOS retina and iPhone 5's 4-inch display

Apps also be required to support both the Retina display and the iPhone 5's 4-inch display  apple will not support apps that doesnot support retina display, and 4 -inch iphone.

Apple and several app developers are use the UDID to track users across different apps because using UUID developer know which particular iOS device is being used to access their app this violate privacy of user (UDID doesn't specifically identify a user). The sharing of UDIDs between advertising networks this leads to identify the activity and interests of the user.