In a post on its developer website, Apple has offered up additional details about the upcoming feature, namely how it must be added as an option in apps that offer competing services. This means that if an app allows you to sign in using Facebook or Google, it also must offer the option to sign in using Apple’s service.
According to Apple, “Sign In with Apple will be available for beta testing this summer. It will be required as an option for users in apps that support third-party sign-in when it is commercially available later this year.” We’re sure that there might be some developers who aren’t to thrilled at the prospect of being “forced” to include this feature, but it should no doubt help with its adoption.
iOS 13 is currently in beta and the full version is expected to be released in the later part of the year, most likely alongside the new iPhones.