

Google Maps was previously limited to viewing maps while offline, but this update will enable iPhone users to navigate with turn-by-turn driving directions, search for specific destinations and look up information about places, including hours of operation, contact information and ratings, while offline.
Google previewed Offline Maps at Google I/O in May, and will be gradually rolling out the new features to Android and iOS users.Now you can download an area of the world to your phone, and the next time you find there's no connectivity--whether it's a country road or an underground parking garage--Google Maps will continue to work seamlessly. Whereas before you could simply view an area of the map offline, now you can get turn-by-turn driving directions, search for specific destinations, and find useful information about places, like hours of operation, contact information or ratings.
Article Link: Google Announces Offline Maps and Navigation Coming Soon to iOS