Snowy is a free app allowing Spotify Premium users to sync playlists with their Apple Watch for offline or tethered playback. In Offline Mode, Snowy can play synced songs without the need for an iPhone through the watch speakers or over bluetooth. In addition to offline music syncing, Snowy offers a number of features such as real time complications, Siri support, and hands-free gesture control.
Snowy for iPhone and Apple Watch is no longer scheduled for release. For more information, please see this reddit post.
Main website: https://snowy.rocks