It's been only three weeks since the launch of Google+ and already iPhone users with a social bent are smiling. Google yesterday rolled out an iOS version of its Google+ app in the iTunes App Store.

The free app is almost identical to the Android version and allows users to create and post to their "Circles," chat in a "Huddle" and view their photos, streams and profiles.

Some users who downloaded the app early yesterday complained the app was buggy. The company later confirmed that a test version of the Google+ app for iOS had accidentally been released and it has since released an update that fixes most of the glitches.

Google+ has seen mixed reviews as a Facebook rival, but it appears to be doing better than past attempts by Google (re: Google Buzz). During the company's earnings call last week, Google CEO Larry Page said the service already has amassed over 10 million users with more than 1 billion pieces of content shared daily.