Which is the best music app for offline?

And cheap? Spotify? Google music? What do u use and why? Currently trying Google music but bit weird with different send. Can add some songs to library but can't find download link...

Google Music.

You can't download individual songs. Either create a playlist and download. Or download an album. support.google.com/googleplaymusic/answer/1250232?hl=en-AU&visit_id=637202970112003184-2219967269&rd=1

YouTube Music is now available with Google.

Which radio station has the good music p train?

Is there something particularly wrong with Windows Media Player????

Yes. This Is the go. As kiteboy Dave says it's not that intuitive an interface. That's the second time I've come across this with Google (hangouts rubbish). But I'm getting the hang of it. (90 days free).
3 week road trip where there are no o radios so madlly downloading family friendly music. The playlist is easy. Just make one purely for down loading. Still go the wrong screen a sometimes but it seems to have everything and good suggestions. Even has radio stations based on bands you like. (Eh pixies radio! Even mudhoney radio just based on some songs I sourced) And u can download their playlists. Do for family I have downloaded mist streamed thus year and it ts got all the latest pop hits and good dance tracks etc.

Google music gives you a subscription to YouTube Red (not the other Red YouTube ;) ) this means you can download videos to your device for later watching (much like the music on google music) and you dont get adds (but i've always used adblocker)..most useful function i found is that you can now listen to videos with your phone screen locked out..other than that its so so, the special content on YouTube Red is pretty meh atm.

Log in wise it will be the same google log in that you use for android/gmail/play store.