I imagine it would be the same as logging in with any other OAuth provider. I highly doubt Apple would lock people out of the ability to sign in with their Appl

I imagine it would be the same as logging in with any other OAuth provider. I highly doubt Apple would lock people out of the ability to sign in with their Apple ID on the web, and if you can sign in on the web, you can sign in on Android. What remains to be seen is if they'll provide an Android SDK as well. Edit: from the developer docs "Sign In with Apple works natively on iOS, macOS, tvOS, and watchOS. And it works in any browser, which means you can deploy it on your website and in versions of your apps running on other platforms."