Some magnet schools have a competitive entrance process, requiring an entrance examination, interview, or audition. Other magnet schools select all students who apply or use a lottery system, or a system combining some elements of competitive entrance and a lottery.
As of February 2016, WhatsApp had 1 billion monthly active users, up from April 2015 when the company announced over 800 million MAU. The company's growth in India is also pretty impressive at around 5 million additional MAU per month (60M in Aug '14).
WhatsApp is a very popular mobile messaging app available for google android, Apple iOS, Blackberry, Nokia Series 40, Symbian 60, Windows Phone. In addition to sending text messages over internet, it also allows users to share and send Images, Audios and Videos with each other. But it has certain limitations :