Ever since it has been launched, the 
number of WhatsApp users has been increasing exponentially. On the eve 
of the New Year, a whopping 7 billion messages were sent and 11 billion 
delivered. With the WhatsApp messaging service actually being adopted by
 millions, many Indian users of the app are believed to have received 
most of their greetings for the new year via this service.
WhatsApp
 is the preferred messaging service offering cross-platform mobile 
messaging for Windows phone, Nokia, iPhone, Android as well as 
Blackberry. The company has not been very forthcoming with regard to its
 user base and it is believed, with its 18 million milestone, some 
numbers will be revealed this year.
What
 started out as a niche app, WhatsApp has grown to be the most popular 
messaging service among smartphones and used even more than SMS. The app
 is now an integral component of any smartphone device in the same 
league as Twitter and Facebook.
Although
 there were rumours about Facebook acquiring the user friendly messaging
 service, it later proved to be false with Facebook Messenger being 
launched by the social networking giant. WhatsApp is free for most 
platforms except iOS for which a free download was made available for 
the holidays recently.
The messaging 
service also recently offered subscribers an unlimited access to the 
service for Rs.16/month in a tie-up with Reliance Communications. It is 
hoped by the increasing user base that other carriers would follow this 
lead and dish out attractive plans.
18
 billion is certainly a tough feat for any messaging service to achieve 
with the number of messages being more than the world's population! But 
as they say records are meant to be broken and it's only a matter of 
time before this one is.
 
 
 
