olemus
kiirsidesüsteem (eeskätt mobiilseadmetel)
tekst-, pilt-, video-, häälsõnumite ja -dokumentide edastuseks:
- omanduslik (Whatsapp Inc/Facebook Inc)
- loodud 2009
- kasutab mobiiltelefoninumbreid tasuta
- mitmeplatvormiline
- populaarseim sõnumsiderakendus,
üle miljardi kasutaja (2016)
- peamine SMS konkurent

Wiktionary:
an instant messaging service founded in 2009 and acquired by Facebook in 2014

ülevaateid
https://en.wikipedia.org/wiki/WhatsApp

https://news.softwarevilla.com/2016/11/23/whatsapp-overview-all-you-need-to-know/

https://firstmonday.org/article/view/10412/8319

https://www.ic.unicamp.br/~oliveira/doc/MHCI2013_Whats-up-with-whatsapp.pdf

turvalisus
https://www.wired.com/story/whatsapp-security-flaws-encryption-group-chats/

https://www.makeuseof.com/tag/4-security-threats-whatsapp-users-need-know/

https://foundation.mozilla.org/en/privacynotincluded/whatsapp/

https://en.wikipedia.org/wiki/Reception_and_criticism_of_WhatsApp_security_and_privacy_features