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Apple announced a new Sign in with Apple button as part of its iOS 13 announcements. The button offers Apple ID single-sign on functionality similar to sign-in buttons from Twitter, Facebook or Google.

Apple is marketing this as a privacy-secure sign-in option. Apple will mask user email addresses and other personal information, whilst still allowing the apps to contact users indirectly.

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Users select what information to share with the destination app. You can share your real email address with the third-party app, or use the ‘hide my email’ option to forward email onwards. In the latter case, the app would only see a random anonymous email address.

Of course, apps must update to integrate the ‘Sign in with Apple’ button. A lot of apps may not want to add the Apple ID login because they cannot access customer data they want. We’ll have to wait and see how this shakes out.

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