According to research firm comScore there were 64.5 million adult users of Google Maps apps in the United States in June against 42 Million for Apple Maps.
This is a significant success for Apple considering that Google Maps is present on both iOS and Android.
In June iOS had 62.6 million app users while Android had 76.1 million.
it is also interesting to note that no other LBS app is entering the top 25.
More: see the full comScore report below.