The Google+ iPhone app has hit the App Store. At 11:44 AM, Vic Gundotra, who has led the Google+ Project, posted an update on Google+ saying, “iPhone, meet Google+…Share just the right stuff, with just the right circles 🙂 This app should be rolling out over the next few hours.”

You can go to the App Store and find it. Here’s the description in the store:

Google+ for mobile makes sharing the right things with the right people a lot simpler. Huddle lets you send super-fast messages to the people you care about most. And no matter where you are, the stream lets you stay in the loop about what your friends are sharing and where they’re checking in.

I can say, as an Android user, that the app has been a very significant part of my staying connected with Google+, and this will be huge in keeping iPhone users engaged.

Last Thursday, when Google held its earnings call, CEO Larry Page announced that Google+ had over 10 million users. While it has no doubt grown significantly just since then, this will be huge for continued growth.

Later today, we’ll have more clues as to how significant this is, as Apple reports its own earnings, and will no doubt share the latest iOS stats.