It is one of the best app I have ever used. This app provides a platform for exchanging text message, video, audio, file, document etc. with no extra cost just with the mobile data. It is simple to use, there is ni complexity. It enables its users to send text message with symbols and smilies. One of the most important feature of this app is that it provides end to end encryption so that no body else except the sender and viewer can encrypt the data. Through WhatsApp users can also do video calling.