Cores iOS and Android apps are not collecting any user data from the device or the user. It is a credential wallet created to receive credentials issued by employers to its employees. Employees then can use the app to log in with received credentials into corporate systems. During login, the credential information is shared with the target corporate system.
Cores app receives credentials only from Cores backend service. Credentials may contain information like email, name, surname, etc… Such credentials are created, managed, and only accessed by employers on the backend.
Cores mobile app does not allow users to create their own credentials.