The app was meant to be an updated version of random video-chat site Chatroulette for today's teens, but without the sexually explicit content. That may be one reason why the app has taken off among the younger set: In April, it was the top iOS app downloaded, according to analytics firm App Annie. 'I think people, adults especially, there's a real disconnect realizing Internet friends are just as important to teens as real world friends,' Monkey co-founder Isaiah Turner said. If you make a connection, you could have a friend on social media, which can be as important as real life.