Launched in 2009 by BRIAN ACTON and JAN KOUM, and sold to Facebook for $19 billion in 2014, WhatsApp is on obviously everyone’s smartphone today. One of the top apps and widely used chat applications, it also supports communication between international phone networks. Between the most popular messaging apps, it currently has more than 1.5 billion users global . Also, it is end-to-end encrypted, thus favored by people in countries where security may be a major concern. The app has a hearty presence in 180 out of the 193 countries in the world, which is the largest share between all messaging and social networks. WhatsApp can be also used for audio and video calls and has introduced a status update feature for its users.