If you want to be updated with all the new android user interfaces, Google Now Launcher is the best option available for you. Google Now Launcher is designed and developed by the Google, it coped with the latest android interface.
Unfortunately Google Now Launcher is available only for the android devices with version jelly bean 4.1 and above.
The launcher has the vivid, crisp interface and looks mesmerising.I have been using google now launcher for about a quite time and loved it.
The best part that I loved about the launcher is, it is boated with the google’s voice assistant google now(note: Both the launcher and the voice assistant are named same so don’t be confused).we can disable the google now(voice assistant) through settings.