As we know that after discovery of Email there are many person has not share there thought intently whatsapp has provided good concept for sending and receiving the message simultaneously photo contact and much more, concept of this app is fabulous and also providing Encryption security mean when message will send then hole message will convert into the some code and this code only decoded by the receiver so we can say I provided better security than other, we are talking about there usefulness so it is so useful in general life.