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Fishman found a Russian developer on Rent ACoder.com, Igor Solomennikov, and introduced him to Koum.
Koum named the app "Whats App" to sound like "what's up".
The service uses standard cellular mobile numbers and the application runs from a mobile device, though it is also accessible from desktop computers.
Originally users could only communicate with other users individually or in groups of individual users, but in September 2017 Whats App announced a forthcoming business platform which will enable companies to provide customer service to users at scale. in September 2007, the duo traveled to South America as a break from work.
However, sales of its Touch Pad proved anemic, and HP made the decision to end the tablet's life after a mere six weeks on the market.
In order to clear out inventory, the manufacturer sliced the starting price to , which sparked a surge of consumer interest.
By early 2011, Whats App was one of the top 20 apps in Apple's U. Facebook, which was advised by Allen & Co, paid billion in cash, billion in Facebook shares, and (advised by Morgan Stanley) an additional billion in restricted stock units granted to Whats App's founders, Koum and Acton.
Koum then hired a friend who lived in Los Angeles, Chris Peiffer, to develop the Black Berry version, which arrived two months later.
Whats App was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users.
At a keynote presentation at the Mobile World Congress in Barcelona in February 2014, Facebook CEO Mark Zuckerberg said that Facebook's acquisition of Whats App was closely related to the vision.
According to a Tech Crunch article, Zuckerberg's vision for was as follows: "The idea, he said, is to develop a group of basic internet services that would be free of charge to use – 'a 911 for the internet.' These could be a social networking service like Facebook, a messaging service, maybe search and other things like weather.