A web-app same as Android's WhatsApp GUI, which is capable to run on mobile browser.
As we know whatsApp is the most popular mobile app in the world. This is working with mobile platform well. Here I have designed a webapp with HTML, CSS and Javascript which requires any browser to run. Currently working only with design (GUI) part.
WhatsApp web is a computer based extension of the Whatsapp account, which works on only desktop browser. Hence it is purly build for mobile based browser.