Kronos is a controller for the Sonos Music System that runs on your Pebble or Apple Watch
Kronos allows you to select the Sonos Zone to controller, and then see the track or media that is playing. You can use Kronos to skip forward and backwards in the queue, pause and play, and control volume.
Kronos is now available for Apple Watch and provides all the same functions, and displays album art.
To get Kronos for your Apple Watch, install Kronos Connect, and select Enable on Watch on your iPhone.
Apple Watch is not supported on the Android version.
For Kronos to work with your Sonos Music system it requires a connection, through your smart phone to the Sonos environment. Kronos Connect provides this connection. Kronos Connect runs on iPhone and Android, and can be purchased from iTunes or Google Play.