What Is a PWA (Progressive Web App)?

A progressive web app, or PWA, is a website built with standard web technology that can be installed onto a phone or computer and still work offline. It behaves like an app, with a home-screen icon and a full-screen view, yet it runs in the browser and needs no app store. Two pieces make this possible: a service worker and a web app manifest.

A PWA sits between a plain website and a native app. It borrows the useful parts of both.

How does a PWA work?

A PWA works by adding two files to an ordinary website. The website itself is normal; these files give it app-like powers.

The first is a service worker. MDN describes service workers as scripts that act as proxy servers between the app, the browser, and the network, enabling offline experiences and push notifications (MDN, updated August 2026).

The second is a web app manifest. It is a JSON file that provides information about a web application, such as its name, icons, and start URL (MDN, updated August 2025).

Together they let the browser offer an "Install" option and keep the app working when the connection drops.

PWA vs native app vs a regular website

A PWA takes the install and offline abilities of a native app without the app stores or separate codebases. A regular website has neither ability; a native app has both, at a higher cost to build.

Feature	Regular website	PWA	Native app
Install to device	No	Yes, from the browser	Yes, from an app store
Works offline	No	Partly	Yes
App store needed	No	No	Yes
One codebase for all devices	Yes	Yes	Usually no

The comparison is really about how often people return. That is also the heart of the wider app versus website question.

What can a PWA do that a normal site cannot?

A PWA can do a few things a plain website cannot, mostly around staying usable when the network is weak. MDN notes it can be installed on the device and operate while offline and in the background (MDN, updated August 2025).

In practice, that means an icon on the home screen and a full-screen view with no browser bar. It means cached pages that still open on a patchy connection.

It can also send push notifications, the kind native apps use. For a booking tool or a dashboard, that is genuinely useful. For a simple brochure site, it rarely is.

Does my business need a PWA?

Most small Malaysian businesses do not need a PWA, because a fast, mobile-friendly website already covers what their customers do. A PWA earns its place when people return often, such as a booking, ordering, or account tool.

For a brochure or lead-generation site, the effort is better spent on speed, content, and a solid responsive layout. A web application with heavy interaction is a stronger candidate than a five-page site.

If your customers mostly buy through a marketplace, weigh that too, as covered in website versus marketplace.

Frequently asked questions

Is a PWA the same as an app?

Not quite. A PWA installs and works offline like an app, but it is a website underneath, and it does not come from an app store. You reach it through a normal web address first, then choose to install it. For many users the experience feels identical to a native app once it is on the home screen.

Do PWAs work on iPhone?

Yes. Both iPhone and Android phones can install a PWA to the home screen and run it full screen. A few advanced device features are more limited on iOS than on Android. For the common uses, offline pages, an icon, and a clean full-screen view, a PWA works well on both.

Does a PWA help SEO?

Yes, indirectly. A PWA is still a website that Google can crawl, and its speed and mobile-friendliness support your Core Web Vitals. Being a PWA is not a separate ranking boost on its own. The gains come from the fast, reliable experience it delivers, not from the label.

PWA or native app, which should I build?

Start with the website, then consider a PWA before a native app. A PWA is less expensive to build, runs from one codebase, and skips app-store approval. Build a native app only when you need deep device features, such as heavy camera or hardware use, that the web cannot reach.

What do I need to turn my site into a PWA?

You need a web app manifest, a service worker, and HTTPS. The site must be served over HTTPS, since a service worker will not run on an insecure connection. Most of the work is technical setup layered onto an existing site, not a rebuild from scratch.

The app question, answered simply

Storming Solutions builds websites and runs SEO, AEO, and GEO for Malaysian businesses, and we help owners tell the difference between wanting an app and needing a faster site. We will not sell you an app you do not need, because often an installable website does the job for less.

Not sure whether you need an app, a PWA, or just a better website? Ask us on WhatsApp, compare an app versus a website, or talk to us about web development.