Zotify pulls from Spotify and uses your Spotify account to get your actual playlists and download the songs directly

I just use Firefox with uBlock origin. Have never had an ad, can listen with locked screen and it basically just works.

I think Grayjay can but I haven’t had as much luck with that playing kick. (It works fantastically for YouTube)

Or just have an open forum/place where you don’t need an account to get into some walled off bullshit.