What is progressive?

Progressive Web Apps (PWAs) are web applications that use modern web technologies to deliver an app‑like experience directly in the browser. They are built with standard web tools (HTML, CSS, JavaScript) but behave like native mobile or desktop apps: they can be installed on a device, work offline, load quickly, and send push notifications.

Let's break it down

  • Web: runs in any browser, no app‑store download needed.
  • Progressive: works for everyone, from simple browsers to the latest ones; features improve as the device gets more capabilities.
  • App‑like: looks and feels like a native app (full‑screen, smooth navigation).
  • Installable: users can add it to their home screen with one tap.
  • Offline/Network‑smart: caches resources so it still works without internet.

Why does it matter?

PWAs give developers a single codebase that reaches both web users and mobile users, saving time and cost. Users get fast, reliable experiences without the friction of downloading from an app store. It also opens up opportunities for businesses in markets where data is expensive or connectivity is spotty.

Where is it used?

  • E‑commerce sites (e.g., AliExpress, Starbucks)
  • News outlets (e.g., The Washington Post)
  • Social platforms (e.g., Twitter Lite)
  • Travel and booking services (e.g., Trivago)
  • Government and public‑service portals
  • Any company that wants a mobile‑first experience without building separate native apps.

Good things about it

  • Cross‑platform: one codebase works on Android, iOS, and desktop.
  • Faster load times thanks to caching and service workers.
  • Can work offline or on low‑bandwidth connections.
  • No need for app‑store approval; updates are instant.
  • Improves SEO because it’s still a website.
  • Lower development and maintenance costs.

Not-so-good things

  • Limited access to some device features (e.g., Bluetooth, advanced camera controls) compared to native apps.
  • iOS support is less complete than Android; background sync and push notifications are restricted.
  • Performance may still lag behind highly optimized native apps for graphics‑intensive tasks.
  • Users may be unfamiliar with “installing” a web app, leading to lower adoption.
  • Requires HTTPS and service‑worker setup, adding some complexity for beginners.