Read more :https://wphacks4u.com/how-to-convert-a-wordpress-or-woocommerce-website-into-an-app-for-free/
Progressive Web Apps (PWA) is a new technology that creates a middle ground between a website and a mobile app. They are installed on the phone like a normal app (web app) and can be accessed from the home screen.

Users can come back to your website by launching the app from their home screen and interact with your website through an app-like interface. Your return visitors will experience almost-instant loading times and enjoy the great performance benefits of your PWA!
SuperPWA instantly converts your website into a fully functional mobile app. No code edit needed.
https://wordpress.org/plugins/super-progressive-web-apps/

Theme used for the website:https://bit.ly/3MjmkBU