Progressive Web App

Progressive Web Apps are technically regular web pages (or websites) but can appear to the user like traditional applications or (native) Mobile applications. This new application type attempts to combine features offered by most modern browsers with the benefits of mobile experience... As of 2017, Progressive Web Apps are supported by the Google Chrome browser, but more browsers may support the features needed in the future. https://en.wikipedia.org/wiki/Progressive_web_app

Progressive-enhancement of a Responsive Web design.