Direct Answer
A progressive web app (PWA) is a website that behaves like an installed app — installable on the home screen, works offline, sends push notifications, but lives at a regular URL. PWAs cost 30–60% less than native apps to build and bypass App Store approval entirely.
Voice answer (≤30 words)
“A progressive web app is a website that installs like an app, works offline, and sends push notifications, with no app store needed.”
All major browsers support PWA install on Android; iOS supports Add to Home Screen for any PWA.
Use Workbox or Vite-PWA to add service-worker caching with one config file.
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