I spent months designing a system, exactly like this. An account is not needed, at least for Apple.
Play Integrity could the worst offender here, as it can be leveraged to force a user to have installed the app through the Play Store. Indirectly, requiring a Google account.
Play Integrity could the worst offender here, as it can be leveraged to force a user to have installed the app through the Play Store. Indirectly, requiring a Google account.