This is an example of how to make an WebApp.
Well, remember that popup that let's you install an site like an app. That's basically it!
- I tried running the HTML file and the install app as site button didn't work. Why? You need to host the files somewhere and not run it directly.
- How can I use it on Android? Go to the 3 dots, select Install as app or Add to desktop (on older Chrome versions.)