AOL’s MapQuest has followed Google Maps into the world of turn-by-turn voice directions. Today the company launched an updated version of MapQuest 4 Mobile for iPhone. When you use the new version to search for directions, MapQuest 4 Mobile will automatically give you spoken directions letting you know when to turn, thus rendering your expensive GPS unit at least partially obsolete.
In addition to letting you know when it’s time to turn, MapQuest 4 Mobile will let you know that you’re off route if you make a wrong turn. There’s also an energy saving option that lets you dim the screen while listening to directions without running down your iPhone battery as quickly.
MapQuest 4 Mobile is available as a free download from the iTunes App Store. It works for the iPod touch as well, but the voice directions are going to be of limited use unless you have a MiFi device or live in a city that’s blanketed by WiFi.