We can go even further and allow users to install the web app on mobile and desktop browsers that support doing so. The installed web app can then be launched by users just as if it were any native app. This article explains how to achieve this using the web app's manifest.
These technologies allow the app to be launched directly from the device's home screen, rather than the user having to open the browser and then navigate to the site by using a bookmark or typing the URL. Your web app can sit next to native applications as first class citizens. This makes the web app easier to access; additionally, you can specify that the app be launched in fullscreen or standalone mode, thus removing the default browser user interface that would otherwise be present, creating an even more seamless and native-like feel.
This allow the app to be launch directly from the device.
These technologies allow the app to be launch directly from the device's home screen.