Google has brought in offline support to its Now info cards. So next time you go through a subway tunnel, you don’t have to worry about losing important directions or your parking place. Your Google Now cards stay loaded, even when you lose cell service. As long as you’re using the latest version of the app, all your information cards should be updated even when you’re cut off from the rest of the world. Although, it’s a minor change, but it could make a big difference to internet bees.
SOURCE: Google+