Answer 1

You can build a Progressive Web App (PWA) (
How to build a PWA from scratch with HTML, CSS, and JavaScript - https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.freecodecamp.org/news/build-a-pwa-from-scratch-with-html-css-and-javascript/amp/&ved=2ahUKEwjvndawhLXqAhUX9nMBHZIqAdYQFjAAegQIBRAB&usg=AOvVaw3SbH7VFihilqCylhPquqDC&ampcf=1
)
And then get it into PlayStore(
How to Get a Progressive Web App into the Google Play Store | CSS-Tricks - https://www.google.com/url?sa=t&source=web&rct=j&url=https://css-tricks.com/how-to-get-a-progressive-web-app-into-the-google-play-store/&ved=2ahUKEwiIsLfVhLXqAhVCgOYKHaQ1CPIQFjABegQIDBAH&usg=AOvVaw1kpXin4XtqM2UvBOWHjQTX )
But you might need some knowledge about Android programming with Android Studio.