A Progressive Web App is a website enhanced with modern browser capabilities so it can be installed on a home screen, load instantly, work partially offline and send push notifications — without app stores, separate codebases or download friction.

How a PWA Differs From a Normal Website

  • Installable: users add it to their home screen; it opens full-screen like an app.
  • Offline-capable: a service worker caches key pages and assets, so poor connectivity does not mean a blank screen.
  • Fast repeat visits: cached shells load in milliseconds.
  • Push notifications: re-engage users without an app store presence.

How a PWA Differs From a Native App

Native apps still win for heavy device integration — advanced camera control, Bluetooth hardware, high-end games. But for content, commerce, booking and dashboard use cases, a PWA covers the need with one codebase, one deployment, and no 15–30% app store commission on payments.

The Business Case

  1. One build instead of three: no separate iOS, Android and web projects.
  2. No install friction: a link is the install. Retail PWAs routinely report higher engagement than their mobile sites and far cheaper acquisition than native apps.
  3. SEO intact: a PWA is still a website — every page is indexable.
  4. Instant updates: deploy once; every user has the new version.

What the Service Worker Actually Does, in Plain Terms

The "offline-capable" feature deserves a bit more explanation since it is the specific technology that makes a PWA feel like an installed app rather than a bookmark. A service worker is a small script the browser runs in the background, separate from the page itself, that can intercept network requests and decide whether to serve a cached response or fetch a fresh one from the server. On first visit, it quietly caches the app's shell (layout, styling, core scripts) and key content; on a repeat visit with no connection, or a poor one, it serves that cached version instantly instead of showing a browser error page. This is the concrete mechanism behind both the "fast repeat visits" and "works partially offline" claims — not marketing language, but a specific, well-supported browser capability that any modern PWA build configures deliberately.

When to Choose a PWA

  • E-commerce stores wanting app-like speed without an app budget
  • News, content and directory platforms
  • Booking and ordering systems for restaurants, salons, clinics
  • Internal business tools and dashboards used on phones

What It Costs

Upgrading an existing modern website to a PWA typically costs 10–25% of the original build. A PWA-first build costs about the same as a quality responsive website — dramatically less than parallel native development.

Frequently Asked Questions

Do PWAs work on iPhone?

Yes. iOS supports installation and offline caching, with some limits on push notifications and storage compared to Android — acceptable for most business use cases.

Can a PWA be listed in app stores?

Yes — wrapped PWAs can be published to Google Play and other stores if store presence matters to your audience.

How much offline functionality can realistically be supported?

Content that does not require live data (browsing previously loaded pages, viewing a cached product catalog) works well offline; anything requiring a live server connection (checkout, real-time booking) necessarily needs to gracefully queue or defer until connectivity returns, which is a design decision worth planning explicitly rather than assuming full offline parity.

Wondering if a PWA fits your use case? See our web app services or ask us for a recommendation.