Spotify's smooth streaming is a great addition to Android Auto

Next up on our quick tour of Android Auto apps — and as you'll recall from our Android Auto primer, that is apps that also support car playback; not separate downloads or anything — comes an application that needs basically no introduction. 

Google Play Music now has some basic browsing functionality on Android's wearables platform.

If you've got the latest version of Android Wear — that is, Android 5.1.1 — and use Google Play Music, you now have a new option for controlling tunes on your watch.