’s Is Now Bigger Than Twitter’s Periscope (Study), the live-streaming video app from, has captured nearly 4.6 million monthly active users on Apple’s iOS platform in the U.S. — making the teen-girl-skewing service bigger today on iPhones than Twitter’s Periscope, which has about 4.3 million on iOS, according to data from SurveyMonkey Intelligence. – Todd Spangler, Variety