Okay I was reading Gizmodo and there was this post about this app that was first of it's kind to be approved my Apples new rules... Here's the post. Source: Gizmodo
There have actually been a few threads on apps like this. This is definitely not a first. Just do a search here for "vibrator" or something like that and you'll probably find them. Makes you want to avoid using someone else's phone, doesn't it?