Utter! had offered an always-listening option that let you wake the app and give it commands. The keyphrase for that is "wake up", but now you can say "wake up" to initiate an Utter! command, or say "Okay Google" to launch straight into Google Now for searches and voice commands. The update also brings integration for playing music through Spotify or Google Play All Access.
Of course, the improvements don't end there. Utter! has also added support for searching Amazon, eBay, Yelp, Twitter, and Foursquare, as well as Ask Yahoo. And, there are new commands to accept or reject phone calls, define words, and more. We were high on this app before, and this update just made it quite a bit better.