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FundamentalsReviewed September 5, 2026

What is Progressive Web App?

PWA

A progressive web app, or PWA, is a website built to behave like a mobile app. People can add it to their home screen, open it full-screen and, in many cases, use parts of it offline or get notifications.

How it works

A PWA is a regular web app with a few extra pieces: a manifest file that describes the icon and name, and a service worker that caches files so the app loads fast and can work with a weak or missing connection.

PWA versus native app

Native apps are downloaded from app stores and can use more phone features. PWAs skip the app store, work on any device from one codebase and update instantly, but support for some features, especially on iPhones, can be more limited.

When it makes sense

PWAs fit businesses that want an app-like experience, like ordering, booking or a customer portal, without building and maintaining separate iPhone and Android apps.

Why Progressive Web App matters

For many small and mid-size businesses, a PWA delivers most of what customers want from an app at a fraction of the cost, while still being findable in search like any website.

An ordering app without the app store

A local restaurant group wanted repeat customers to reorder quickly but couldn't justify two native apps. A PWA with saved orders and a home screen icon gave regulars an app-like shortcut while new customers could still order from the website.

Common mistakes

  • Expecting full native features everywhere

    Some features work differently on iPhone and Android browsers. Check support for anything you need, like notifications.

  • Calling any mobile site a PWA

    A responsive site isn't a PWA on its own. It needs a manifest, a service worker and HTTPS.

  • Forgetting offline states

    If the app caches content, show clear messages when something can't load without a connection.

Where we work on this

Applied, not theoretical

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