WhatsApp Messenger is a cross-platform smartphone messenger that is available for iPhone, Android, Symbian, BlackBerry and Windows Phone systems. Easy instant messaging from anywhere in the world with an internet connection, between different phone systems is WhatsApp Messenger's claim to fame.
With an easy-to-use interface, users can also create group conversations with several contacts. If you are away or have no internet connection, the application records your offline messages so that you can read them later on. In addition, users are also able to send and receive multimedia files, including videos, images, and even voice notes. Since the app operates like an SMS exchange and uses phone numbers integrated from the user's address book, there are no pins or usernames required. The application also allows users to block contacts, share their locations, keep track of e-mail histories, personalize notification sounds, and many other features.