Google has today made the “Google Now Launcher” available for all Android devices running Android 4.1 Jelly Bean and above. The launcher was previously only available for Nexus and Google Play Edition devices.
The launcher makes Google Now just one swipe away. From the primary home screen, you can swipe right to access Google Now cards. You can also trigger “Ok Google” whilst you are on the home screen for a search query. It can be downloaded right now through the Google Play Store.