Periscope Hits 10 Million Total Users 

More than 10 million people have created Periscope accounts since the product launched at the end of March, and nearly two million people use the app every day. It’s the first time since Twitter’s Q1 earnings call in April that we’ve seen any real user metrics for the app; on that call, former CEO Dick Costolo said that Periscope added more than a million users in its first 10 days.

Source: Periscope Hits 10 Million Total Users | Re/code