Aicrest is designed to know as little about you as possible. The app currently uses Sign in with Apple to authenticate access, but it does not ask Apple for your email address or name as part of sign-in. The Apple sign-in request is made with no requested scopes, because the purpose of authentication here is not marketing, profiling, or contact collection. It is simply to help Aicrest control access to services it pays for on behalf of users, such as backend-mediated voice features, and to reduce abuse.
That distinction matters. Aicrest needs a way to verify that a real signed-in user is making a request, but it is built to avoid turning that into a channel for collecting personal profile data. The sign-in flow is there to authorize usage, not to build a dossier on you.
Not convinced? See the screenshot of our backend system responsible for user authentication that “Sign in with Apple” talks to. There is nothing for us to know about your identity, apart from the user ID that essentially is a random text.