After revamping Gmail, YouTube, and Shopper and releasing Maps to generally favorable reaction, Google has now substantially updated the iOS app for its “additive” social network.

The latest update to Google+ for iOS also delivers a refreshed interface, which, I should point out, is rather nice and, er, refreshing.

Beyond that, the update brings a number of new features, foremost of which is support for Google+ Communities.

Launched just last week, Communities lets you interact with other like-minded people through public or private conversations. It’s a lot like the Groups feature in Facebook, that other social network you might have already heard of.

Google+

Also added through the app’s new update is the ability to subscribe to any circle for notifications. Just go the Settings section of the app, tap the Circle subscriptions option under Alerts, and toggle your subscription to any of your Circles.

Furthermore, the ability to indicate how many guests you’re bringing to an event has also been added. Support for time zones in Events is also a plus.

Basic profile editing, a new compose UI, a redesigned visual stream, and a new Find People section are the other significant pluses in the latest version of Google+.

Compatible with iPhone, iPod touch, and iPad, Google+ is available in the App Store for free.