For what it's worth, the wording Apple uses in their App Review Guidelines [1] is:
> 4.3(b): Also avoid piling on to a category that is already saturated; the App Store has enough fart, burp, flashlight, fortune telling, dating, drinking games, and Kama Sutra apps, etc. already. We will reject these apps unless they provide a unique, high-quality experience.
[1]: https://developer.apple.com/app-store/review/guidelines/