Apple has approved Google+ for iPhone, and the mobile app is now available for download from the iTunes store.
Vic Gundotra, a senior vice president of engineering at Google, said the social-networking application would be "rolling out over the next few hours" at 4:44pm on Tuesday afternoon.
The Google+ download on Apple's iTunes store requires iOS 3.1 or later and is compatible with the iPhone 3G, 3GS and iPhone 4.
"Works great, no crashes on [iOS] 4.3.3," Robert Greene wrote in reply to Gundotra's announcement at 5:11pm.
The application appears almost identical to the Android implementation, though some of the landing images appear to have been rescaled. The Android application launched at the same time as the service.
Google+ launched in limited trial on 28 June. Since then it has gathered over 10 million members, according to Google's chief executive Larry Page.