Check Someones Whatsapp Messages About WhatsApp Messenger App: Website: http://whatsapp.com WhatsApp Messenger is a cross-platform mobile messaging app developed by WhatsApp Inc. Like Skype, WhatsApp Messenger makes use of mobile data plan or your Wi-Fi connection to send messages, calls, and transfer media such as video, images, and voice messages, all without MMS arise, SMS, or voice call charges. WhatsApp Messenger is virtually free compared ...