Google is putting the “finishing touches” on a new mapping app for the iPhone, according to The Wall Street Journal. Test versions have been distributed, but it’s still unknown as to when Google will submit the app to the iTunes Store for approval. Turn-by-turn navigation is expected to be included in the app. A recent report indicated that some sources doubt Apple will approve Google’s Maps app, a point that has been disputed by subsequent reports. regardless, phone and mapping rival Nokia may beat Google to the punch in releasing a high-profile alternative to iOS 6 Maps.