Spotube’s Android client had a lot of performance issues last time I tried it (which was a while ago, to be fair) and seemed to be pulling everything from YouTube Music despite the name. I think RiMusic and InnerTune are a lot better, personally. InnerTune if you want a simpler, more traditional UI, RiMusic if you don’t mind something a bit more convoluted but also fun and different. RiMusic has some more traditional UI options now as well but I like the older one with the menu on the side - it feels like an app on an early smartphone, back when everything was weird and fun.