Would you like your iPhone to give you audible driving directions? If so, you should check out MapQuest. It is a free, turn-by-turn GPS navigation app for the iPhone and iPad. MacWorld wrote an extensive review of GPS apps in 2011. After reading the article, I purchased Navigon. [Note May 2019: Navigon is no longer available in the US for iOS] I used Navigon for a few months and liked it,but found the interface cumbersome. After a client praised it for its easy-to-use design, I tried MapQuest. It had also been highly rated in MacWorld’s review of GPS apps. While MapQuest doesn’t have all of the features offered by Navigon, I prefer it for its relative ease of use.