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.
Providing a bundle of these free of charge to users will work like a gateway drug of sorts – users who may be able to afford data services and phones these days just don’t see the point of why they would pay for those data services.
The oldest device capable of running Whats App is the Symbian-based Nokia N95 released in March 2007.
In August 2014, Whats App released an update to its Android app, adding support for Android Wear smartwatches.
On February 26, 2016, Whats App announced they would cease support for Black Berry (including Black Berry 10), Series 40 and Symbian S60, as well as older versions of Android (2.2), Windows Phone (7.0) and i OS (6), by the end of 2016.
Whats App was officially made available for PCs through a web client, under the name Whats App Web, in late January 2015 through an announcement made by Koum on his Facebook page: "Our web client is simply an extension of your phone: the web browser mirrors conversations and messages from your mobile device—this means all of your messages still live on your phone".
In December 2009, the ability to send photos was added to Whats App for the i Phone. Facebook, which was advised by Allen & Co, paid $4 billion in cash, $12 billion in Facebook shares, and (advised by Morgan Stanley) an additional $3 billion in restricted stock units granted to Whats App's founders, Koum and Acton.
By early 2011, Whats App was one of the top 20 apps in Apple's U. 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.
The Whats App support staff announce that messages were encrypted in the "latest version" of the Whats App software for i OS and Android (but not Black Berry, Windows Phone, and Symbian), without specifying the cryptographic method.
Whats App introduces a feature named Read Receipts, which alerts senders when their messages are read by recipients.
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.
Fishman found a Russian developer on Rent ACoder.com, Igor Solomennikov, and introduced him to Koum.