Google has launched a new strategy for beta testing the Google App via the Play store. The Google app features several key functions like Now Launcher, Cards, Now on Tap and other search features. Earlier, the users had to go through a G+ community, but now the users have to just visit a web page set up by Google to sign up. Once this is complete, the user will be directed to the play store where the app will be updated to the beta version.
If you are looking to try this app, hit the link below. Just on a cautious note, since this is a beta build, it may be unstable and might contain some bugs.