https://www.theverge.com/2018/2/9/16994382/apple-homepod-release-day-price-compatibility

The notion of Apple’s “walled garden” ecosystem of products precedes even the iPhone. For as long as the company has existed, Apple products have worked best with other Apple products and that’s been that. But the new HomePod speaker, which is going on sale today, ratchets this commitment up another notch. If you thought you were locked inside the Apple ecosystem before, buying a HomePod is like adding an iron ball to those chains.

The HomePod costs $349. That’s a high price for the vast majority of people, and it pretty much guarantees that you’ll be using the HomePod as the primary listening device in your home. The HomePod has voice control for music playback, but you’ll have to be tapping into Apple’s own Apple Music, iTunes tracks, or iTunes Match to take full advantage of Siri. Alternatively, you can use AirPlay from an Apple device, which gets you access to services like Spotify but with drastically simplified play/pause voice control. In any and all cases, to get the most out of the HomePod, you absolutely must have a subscription to an Apple music service and an iOS device to set the speaker up.