One of the founders of Instant Information Apps System has officially informed that the number of WhatsApp users has now reached 600 millions. He has disclosed this through his twitter account.
Next in line are wechat with 438 million customers and Viper with 100 million customers.
The significance of the popularity is decided by the continuity of using the App. WhatsApp is free for the first year of use; thereafter, there is a charge of 1$ (or Rs. 60/-),
It is significant to note that Facebook bought this company at a price of $ 19 billion. The ever-expanding customers circle has proved to be the main reason for this right judgement!