WhatsApp is a free to download messenger app for smartphones. WhatsApp uses the internet to send messages, images, audio or video. The service is very similar to text messaging services however, because WhatsApp uses the internet to send messages, the cost of using WhatsApp is significantly less than texting. It is popular with teenagers because of features like group chatting, voice messages and location sharing .
Growth Of WhatsApp ?
With 700 Million users, as of January 2015, WhatsApp is currently the biggest online messenger app on the market. Founded in 2009 by ex-Yahoo employees it started as a small startup and swelled to 250,000 users in just a few months, growing so fast that they had to add a charge for using the service per year to slow the subscription rate down. In 2014 WhatsApp was acquired by Facebook.
On A Regular Basis Keep On Clicking WhatsApp menu and click on WhatsApp web option . If your account is being viewed then you must see an active session option and just click on End all active Sessions and if your account is not being viewed then it would again open camera .