Write and send messages to your friends and contacts from your iPhone.
WhatsApp went down for a couple of hours last night, and Facebook apologised just days after buying it.
Aimed at people in West Africa, the BBC will use the popular messaging app to provide updates about the spread of Ebola.
Mark Zuckerberg says he's not yet sure how he plans to see a positive return on his massive investment in the messaging service.
The closing of the deal follows last week's regulatory approval from the European Commission.
With FTC approval granted in April, the approval in Europe means the deal should finally wrap up soon.
In the six months since Facebook announced it was buying the messaging app, the service's monthly active user base has grown by 150 million.
As the acquisition draws to a close, co-founder says company is most concerned with growing its user base and engagement and would be happy to just break even.
Facebook wants European competition watchdogs to investigate its $19 billion acquisition of WhatsApp in a bid to head off future antitrust problems.
Calling the Facebook CEO (and new owner of WhatsApp) an “American Zionist,” an Iranian censor blocks the popular messaging app.
Adding 50 million active users in two months time, the messaging app is well on its way to reaching a billion people, just as Mark Zuckerberg anticipated.