I was thinking about paying to join the Apple Developer program for access to the Apple Music API, and making an app just for practice in improving my skills. I was looking at the sample response data in the documentation online, and noticed there's some stuff missing that I would want to use. Mainly what songs are in a playlist (it looks like you get that info for a catalog playlist but not a library playlist, which seems backwards but maybe I'm confused about what those mean), and information about particular songs in a user's library like number of plays, date last played, etc. Basically I thought you'd get access to anything you can see in the Apple Music Player on the desktop version. It seems like that's obviously not true but I was surprised, so I thought I'd ask to see if anyone who has used the API can tell me for sure. Probably don't want to pay if you don't get access to all the data I was thinking about.