There has been quite a fuss made of Apple's approach to the HomePod, with a lot of people calling it an walled garden affair. Find the track you want to play. However, that's not strictly true – you can stream Spotify, Deezer, Amazon Music, Pandora, your favourite internet radio stations and a whole lot more on a HomePod using AirPlay.. Open Spotify on your iPhone or iPad.
I tried comparing Spotify & Apple Music just plugged into my car using my 3.5 mm port from my iPhone SE (Still going strong! The difference is also detectable even apart from HomePod. I even turned off the EQ in the music settings for Apple Music and it sounded EVEN BETTER! Night and day difference.
How to play Spotify music on HomePod. If you don't have the app you can download it from the App Store. ), and it's the same story as yours.