I know that Apple's Terms say that you can't explain to your users, that they have to pay some 30% "Apple Tax" for in-app purchases. But could you just say something like "30% mobile phone app fee", to go around it, while making it clear to the user why they're paying this amount? I feel like it would be illegal for Apple (or Google Play) to prohibit developers from breaking down costs like that? Like I don't get it.