Apple has updated the App Review Guidelines once more, in a crackdown on apps creating non-consensual adult imagery that are sold using bait-and-switch tactics to pass the review process.

The App Store prohibits nudification apps.
While Apple has a fairly robust App Store Review process and guidelines to match, not everything that makes it through the examination does so legitimately. In some cases, developers use deceitful tactics to hide an app’s true nature so it can get into the App Store, despite having features that are against the rules.
Bait-and-switch apps that present as one thing to the App Store but can be something quite different aren’t new. This behavior has been used by scam and malicious apps, as well as, in one instance, Russian banks.