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).
Apart from being the most popular app on this list, it may also be the most notorious. For one, its acquisition by Facebook for $16 billion drew a lot of attention. Also, WhatsApp has done something the others havenât: stopped being free. Though itâs free for the first year, it goes up to 99 cents per year after that.