In November, Google announced custom voice actions for Google Now, which means you can integrate your app content directly into Google Now. So if you want, you can enable Google’s “Okay Google” voice action with your apps voice actions to trigger it to work with your app.

Well, that feature launched yesterday afternoon for searchers.

Google said on Google+, “we launched our first set of partners for custom Google voice actions on Android.”

Google added:

For this to work, the searcher needs the latest version of the Google app and the Android apps.

If you have an app you want included, you need to fill out this form.

Forum discussion at Google+.