Whatsapp messenger app is an instant messaging app and it is one of my favourite app. It is founded by jan koum and brian acton and it was founded on 24th February 2009. Whatsapp encrypted messaging app is now owned by facebook. This app has the facilities like voice calling and the newer version also has the facility of video calling. This is the only messaging app which has Crosse 1billion downloads on google play store. Whatsapp messaging very easy to use. Its functionality are also good enough. So this is a good messaging app