Apple: new apps can’t use UDIDs, must support Retina, 4” screens

Apple has announced on its developer website that starting May 1, the App Store will also no longer accept new apps or updates that access device-specific identifiers known as UDIDs. It’s been known for some time that Apple planned to phase out the use of UDIDs, replacing them with the new Advertising Identifier in iOS 6. On the same date, new apps and updates submitted to the App Store must be built for iOS devices with Retina displays, and must support the iPhone 5/iPod touch 5G four-inch displays, suggesting that Apple will emphasize larger and/or higher-resolution screens while downplaying smaller, lower-resolution ones.

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