29.ABOUT WHATSAPP (2019)

WhatsApp Messenger is a freeware, cross-platform messaging and Voice over IP service owned by Facebook. It allows users to send text messages and voice messages, make voice and video calls,

 Initial release: January 2009; 10 years ago

Developer(s): WhatsApp Inc

Written in: Erlang

Size: ~157.7 MB (iOS); ~25.09 MB (Android)

Owner: Facebook