Change "OK Google" hotword I want to change the Hotword for the Google Assistant.

Is it possible to change the hotword from "OK Google" to something else?

Do i need a rooted device?
UPDATE: According to a comment below, the OpenMic+ app has been taken down by the author.



According to Google Help Forums, this feature seems  not to have been implemented yet:


  At this moment, changing the hotword is not an available feature.
  However, we appreciate your feedback, and your feature request has
  been noted.


Fortunately there is a workaround:

There is an application, Open Mic+ for Google Now, with lots of customisation and enables the user to change the hot phrase.


  With Open Mic+ you aren’t limited to “Okay Google”. Live out your
  sci-fi fantasies, support your favourite team, and just feel awesome
  with complete control over your phone.


Instructions:


Download and install the latest version of Google Search App on your device if you haven’t already.
Download and install Open Mic+ For Google Now App.
After installation ,open the app Open Mic+ For Google Now.
As soon as you open up the app you will see a warning indicating you to turn off Google Now Hot word Detection, here click on Settings >>Voice >> OK Google Detection >> Turn it Off.
Now head back to Open Mic+ For Google Now App and tap on Say area with a pencil icon.
Here type any command with which you want your Google Now respond like “Hey Device” and then hit Set.
Once set click on the Play button.
That’s it you now have successfully customized and changed Google Now wake up command from OK Google to something else in this case to Hey Device.


Hope this helps

References:


Alternative to "Ok Google"
How To Change Google Now Command From Ok Google To Something Else