WhatsApp can be used on a desktop computer. As of early 2015, WhatsApp users must have Google Chrome, Mozilla Firefox, or Opera to use the app on a computer.
WhatsApp is a mobile messaging application that allows users to send text messages via Internet data to avoid paying SMS fees. In addition to computers, the supported devices currently include Windows phone, iPhone, Blackberry, Nokia S40 and S60, and Android.
WhatsApp users can send individual or group messages, and cross-platform messaging is supported. In addition to text, users can send and receive unlimited images, audio and video. WhatsApp can be downloaded for free.