So in my new music app game I'm creating, I'm allowing the user to pick a song from his own music, then play it in response to a prompt. Assuming the prompts are all 4+ rating, what would the appropriate rating be for the app once I submit it? Do I call it 4+ since that's what the prompts are? Or 17+ because the user's music might be that extreme? Some of my prompts aren't so PG anyway, so it might be a bit of a moot point, but I'm just wondering the most extreme rating an app would take based on the contents of a music library, a sort of precedent. Thanks!
You cannot predict the contents of a user's music library, so I would go for 4+. If you are really concerned, consider ringing Apple's Developer Support and running it past them before submission.
Good luck!