Maybe you’re not a fan of the Siri or you think your digital voice assistant could use some digital assistance. If you’ve got a jailbroken iPhone, you can now pick up the NowNow app to address that very need.
I should be clear, though, that this isn’t really Google Now in the way that you get with Android Jelly Bean. You don’t get those “cards” for the weather and directions for the drive home. Instead, what NowNow does is bring Google Voice Search to the forefront. All you have to do is hold the home button and up will pop the Google Voice Search. That part of the interface really does look like the Android equivalent.
It should be noted that Google Voice Search doesn’t communicate with other iOS apps, so you won’t be able to set appointments or that kind of thing, but you might find the Google searches to be more accurate than what Siri is giving you. You can find NowNow in the BigBoss repository in Cydia and it’s a free download.[Source]