Which Music Server uses Amazon Fire as the controller?

Just can not recall. Please let me know. 
If you are a Prime member you can load your audio files on Amazon Cloud and play it that way
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I tinking ofa music server, like Blue-sound or Auriliac that can use the Kindle Fire as the controller. Please advise.
Since I received no useful input, I researched and realized the Bluesound Node 2 can use the Amazon Kindle Fire as a controller. So, has anyone tried this? Compared to the Sonos original style controller? I'm just not excited about using my laptop and would like a stand alone, small control approach.