Progressive Web Applications take advantage of new technologies to bring the best of mobile sites and native applications to users. They're reliable, fast, and engaging. - Google Web Fundamentals
Visit flipkart.com on your mobile phone (android device at the moment) and then add it to your homescreen. You can use Firefox, Chrome or Opera.
This progressive web app took advantage of newer functionality available in the browser (hence the name progressive), and now it's able to run from the homescreen, work offline and even receive push notifications.
You can browse other progressive web apps at pwa.rocks
This starter sets up most of the tools that you will need to build a progressive web app.
However you will still have to customize the web app manifest and the service worker code.
The documentation will help you with that.
Progressive web apps require SSL to work
We recommend the excellent Google Web Fundamentals
Updated less than a minute ago