Apple has announced that any apps that are submitted to their app store after the 1st of June 2016 must supports IPv6.
The company announced the change to IPv6 only networks services at last years Worldwide Developer Conference.
At WWDC 2015 we announced the transition to IPv6-only network services in iOS 9. Starting June 1, 2016 all apps submitted to the App Store must support IPv6-only networking. Most apps will not require any changes because IPv6 is already supported by NSURLSession and CFNetwork APIs.
If your app uses IPv4-specific APIs or hard-coded IP addresses, you will need to make some changes.
You can find out more details about the changes to app submissions to the Apple App Store over at the company’s developer website at the link below.
Source AppleFiled Under: Apple iPad, Apple iPhone