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".Whats App was founded in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo! In January 2009, after purchasing an i Phone and realizing the potential of the app industry on the App Store, Koum started visiting his friend Alex Fishman in West San Jose where the three would discuss "...having statuses next to individual names of the people", but this was not possible without an i Phone developer.
In June 2009, Apple launched push notifications, allowing users to be pinged when they were not using an app.
Acton was still unemployed and managing another startup, and he decided to join the company.
After months at beta stage, the application eventually launched in November 2009 exclusively on the App Store for the i Phone.
Koum changed Whats App so that when a user's status is changed, everyone in the user's network would be notified.
Whats App 2.0 was released with a messaging component and the number of active users suddenly increased to 250,000.