Apple has removed rating feature (1star-5star) in music app after released iOS10, which users can rate and save feedback at music library,meantime users also can sort audio track through it .
Fortunately,this function now seems return, according to iTunes expert Kirk McElhearn said,he found star rating system has been returned to iOS Music application in iOS 10.2 Beta ,users can find a switch for star rating now .
Comparing with previous versions, iOS 10.2Beta have more steps in whole rating process if users want to rank.when you playing a song,you need click "..." the ellipsis in the lower right corner,and will show a menu ,then you need scroll down to find "rate song". But in the previous version of iOS, just click on the song art illustrations, you can find the star rating menu.
According to the sub-menu setting ,it shows that the star rating does not affect the "recommended for you" the song recommended.