Just the other day (coincidentally two days after the GM release of iOS 12) I was notified of a $9.99 charge. Turns out I was subscribed to Apple Music. Which is odd because I didn't do this. I cancelled the subscription and Apple refunded me the $9.99.
Just a heads up in case anyone experiences the same thing after installing iOS 12.
Just a heads up in case anyone experiences the same thing after installing iOS 12.