Until 2017 Whats App positioned itself as a solution for a single party with a single smartphone to communicate with another such party, enabling small businesses to use the platform to communicate with customers, After months at beta stage, the application eventually launched in November 2009 exclusively on the App Store for the i Phone.
In January 2010, support for Black Berry smartphones was added, and subsequently for Symbian OS in May 2010 and for Android OS in August 2010.
The application runs from a mobile device though it is also accessible from desktop computers; the service uses standard cellular mobile numbers.
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.
A month later support for Windows Phone was added, followed by Black Berry 10 in March 2013.
In December 2009, the ability to send photos was added to Whats App for the i Phone. In April 2011, Sequoia Capital was the only venture investor in Whats App and paid approximately million for more than 15 percent of the company, after months of negotiation with Sequoia partner Jim Goetz.
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.
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".