I noticed the following agent user strings hitting my website and wondered which browser is this user string for?
Mozilla/5.0 (iPad2; iPad; U; CPU OS 5_1_1 like Mac OS X; en_GB) com.google.GooglePlus/10352 (KHTML, like Gecko) Mobile/K93AP (gzip)
and
Mozilla/5.0 (iPhoneUnknown; iPhone; U; CPU OS 6_0 like Mac OS X; en_GB) com.google.GooglePlus/8654 (KHTML, like Gecko) Mobile/N42AP (gzip)
Could it be the Google Plus app on the iPad/iPhone?