You are right, now that I think about it Spotify was only good on macOS and Android for me. The official app wasn't even available for Linux on my platform. And I wasn't able to find all the music I wanted with it anyway, so I might give it a shot, thank you!

There's a FOSS companion app for AirPods on Android and some features are "locked" until you press "Activate" and choose "I've spent all of my money on AirPods" as a payment method.