There is no need to review this app as everybody know about WhatsApp. Nowdays everybody is using whatsaApp after Facebook, Youtube, whatsapp is no.1 largest user app. You can send text message with images, videos and do unlimated voice call. The clarity of call loud and clear depended on your data plan. Now they have increase security level of whatsapp by encrpyting all messages. The interface is very good and simple. In india whatsapp is lifetime free as we are growing economy. Somehow I feel if they provided one more option on whatsapp, if we can share files ( data: excel, word) . So that will help many people. It is good and exceeded everyone expection.