Periscope, Twitter's live-streaming app, now has 10 million accounts active on iOS and Android. The app was launched about four months ago; it hit 1 million users in the first ten days.

Image via The Verge. Image 1.Image via The Verge

Kayvon Beykpour, Periscope's founder, said in a broadcast today that the best metric for judging the success of the app is the amount of time watched each day, rather than the number of active users. Users collectively watch 40 years of content daily on mobile devices alone.

 Twitter purchased Periscope for 100 million dollars in March 2015.

 Video piracy has been an issue for Periscope, as critics claim they need better policies to deal with copyrighted content. Several users of the service used it to broadcast live the fifth season premiere of HBO's Game of Thrones. 

 Last week's GOP debate on Fox News left many people without cable no way to watch the debate, since their streaming broadcast crashed. As a result, many people turned to Periscope, where users were broadcasting their televisions showing the debates.

Cover image: Variety