The good news: The current version of SmartPlaylist (v.9.4) works also with iOS 10. There are just a few minor problems which I'm working on to make an update in the next few weeks. Please report the bugs you find to Smartplaylist Support.
Please don't forget to allow SmartPlaylist to access your media library. You should find this setting in Apple's Settings app under SmartPlaylist. Without this permission SmartPlaylist cannot do anything for you.
The bad news: The Music app in iOS 10!
- You can no longer rate a song with stars
- You can no longer view the lyrics which you added to a song in iTunes
SmartPlaylist still shows you the star rating and the lyrics and you can still use them to search/filter, as before.
However, I have not yet found a way to access this new silly heart/love/like/dislike rating, which is now the only type of rating possible on the device.
Let's see what Apple next decides for us ...