PWA
Progressive Web App
A PWA is a website that behaves like a native app: installable, usable offline, with notifications.
A PWA relies on a service worker that caches resources and a manifest file that defines the icon, name, and behavior of the app. The visitor can add it to their home screen without going through a store.
For a small business, a PWA avoids the cost and delay of publishing to the App Store or Google Play while keeping part of the app experience. The choice makes sense when repeat use matters more than discovery.