Both the C3 editor and all the projects it exports comply with that checklist (provided you host in HTTPS, which has long been our recommendation). I just tried it with the C3 editor and it worked as expected, installing an app which ran as its own task on Android and could be uninstalled like other apps.
i think you don't get it ...
just go to flipkart.com and add that page to your desktop , chrome will make an APK from that website and you can find that app in your android drawer and your settings > apps .
but when you add c3 to your android desktop its just make a shortcut from c3 on your desktop.
for more info go here :
inovex.de/blog/progressive-web-apps-vs-webapks