Sounds great, but I’m still worried because this App might hijack the Apple ID and password. If I remember it correctly, Apple does not publish their Apple ID API outside of iOS SDK.
They don't even publish the Apple ID API inside the iOS SDK. There is no way to directly use Apple ID as a form of identification. Only 2nd-hand ways, like GameCenter, and iCloud.
That's what I meant, through Game Center and iCloud.
I absolutely agree. This is really impressive if it works, but there's no way I'm giving this my Apple ID.
Not sure if you're wanting this because you're switching devices but for full time android users it shouldn't be a big deal to set up a new apple id to use this app.