After leaving Yahoo and being turned down from Facebook, Jan Koam (CEO) and Brian Acton on February 24 2009 (on Koam’s birthday actually) incorporated WhatsApp Inc. in California. Later in 2014, Facebook acquired WhatsApp for US $19 billion.
Competing with other messaging services like Viber, I would say WhatsApp is doing pretty good considering the fact that in January 2015 they announced reaching 700 million monthly active users with over 30 billion messages being sent every day.
This review refers to the Version 2.11.528 of WhatsApp Messenger, the one that I’m currently using.
WhatsApp started as an iPhone app, but now besides iOS, it is [...]