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 to take a break from work.
Fishman found a Russian developer on Rent ACoder.com, Igor Solomennikov, and introduced him to Koum.
In August 2014, Whats App released an update to its Android app, adding support for Android Wear smartwatches.
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.