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.On February 24, 2009, he incorporated Whats App Inc. However, because early versions of Whats App often crashed or got stuck at a particular point, Koum felt like giving up and looking for a new job, upon which Acton encouraged him to wait for a "few more months".In June 2009, Apple launched push notifications, allowing users to be pinged when they were not using an app.Fishman found a Russian developer on Rent ACoder.com, Igor Solomennikov, and introduced him to Koum.
“This conference is supposed to be the beginning of a new movement,” reinforces Beata Weber, Head of the Language Department of the Goethe-Institut / Max Mueller Bhavan and driving force behind FUTURE (T)HERE, the first Youth Conference on Sustainable Living,.
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".