1. Sign in to chat.google.com.
  2. In the top right of chat.google.com, click Settings "" and then Install Chat app.
  3. To get chats, make sure the standalone app and Chrome browser are open.

    To open the app from Chrome, go to chrome://apps and click Hangouts Chat. On a Chromebook, you can find the app in Launcher (button at the bottom left of the screen)

To download the Chat App to your mobile device