Apps That Have Access to UDIDs, and don’t support 4-inch screens will be rejected starting May 1st.

Today, Apple stated officially that they will start rejecting App Store apps that have access to device UDIDs. This new policy will be implemented starting May 1st. The UDID system will be replaced with the iOS Advertising Identifier, a non-personal identifier that developers can use. Starting May 1, the App Store will no longer accept new