Whatsapp is one of the best and greatest app which can use to make calls, chatting, sending files etc. Whatsapp provide a best video calling facility which helps me talk with my parents, friends, relatives and all. I can’t start my day without whatsapp. Whatsapp became a part my life, not even me I think it became a part of everybody. For almost everything whatsapp is now became a mediator, it helps me to send office documents, files, contacts, photos in seconds. Its a great app.