Google made available updates to Android and iOS versions of its Google+ application. Google+ update for iOS version adds several features like share photos directly to events, video chat with upto 9 friends, instant upload to sync photos from phone to Google+ album, High-resolution images on Retina display devices, Messenger to chat with your friend, Hot stream to see popular posts. This app is designed for both iPhone and iPad.
The Android version of Google+ has same improvements like iOS version, the features are Magazine style layout, Share photos to an Event with Party Mode, Video chat with 9 members, Instant upload to sync photos and additionally to View the Nearby stream what people near your location are saying. Google+ for Android and iOS is a free download.
GSMArc.com : List of Android Mobiles, List of iOS Devices