# What is a Progressive Web App? > What is a PWA? Progressive Web Apps explained: how they work, benefits over native apps, examples like Starbucks, and when to build one. Canonical: https://app369.com/glossary/what-is-pwa/ [← Back to Glossary](https://app369.com/glossary/) Quick Answer **A Progressive Web App (PWA) is a website built with modern web technologies that delivers an app-like experience, including offline access, push notifications and home screen installation, without requiring download from an app store.** A **Progressive Web App (PWA)** is a web application that uses modern browser capabilities to deliver an experience traditionally associated with native mobile apps. Users can install a PWA to their home screen, use it offline, receive push notifications, and interact with smooth, app-like transitions, all without ever visiting an app store. ## How PWAs Work Three core technologies make PWAs possible. **Service workers** are JavaScript files that run in the background, intercepting network requests and caching resources so the app functions even when the device is offline or on a poor connection. The **web app manifest** is a JSON file that tells the browser how the app should appear when installed, including its name, icon, theme color, and display mode. **HTTPS** is required for all PWAs because service workers have powerful capabilities that must be delivered over a secure connection. When a user visits a PWA-enabled website, the browser can prompt them to “Add to Home Screen.” Once installed, the PWA launches in its own window without browser chrome, looking and behaving like a native application. ## Key Features PWAs offer several capabilities that set them apart from traditional websites. **Offline support** means users can access cached content and core functionality without an internet connection. **Push notifications** re-engage users just like native app notifications do. **Installability** lets users add the app to their home screen with a single tap. **Responsive design** ensures the experience adapts to any screen size, from phone to desktop. **Automatic updates** happen in the background every time the service worker detects new content, so users always have the latest version. ## Benefits of PWAs **No app store required.** Users access your PWA through a URL, eliminating the friction of app store downloads. **Smaller footprint.** A PWA is usually much smaller to download than a native app. **Instant updates.** Deploy changes to your server and every user gets them immediately, no review process, no waiting for users to update. **SEO-friendly.** Because PWAs are web pages at their core, search engines can crawl and index their content. **Lower development cost.** A single codebase serves all platforms, reducing development and maintenance overhead compared to building separate native apps. ## Real-World PWA Examples Some of the world’s largest companies rely on PWAs. **Starbucks** built a PWA that works offline so customers can browse the menu and customize orders even without connectivity. ## PWA vs Native App Native apps still hold advantages in areas that require deep hardware access, such as Bluetooth, NFC, advanced camera controls, and certain biometric features. Native apps also benefit from app store discoverability and the trust users place in official storefronts. PWAs excel when your priority is broad reach, low friction, fast loading, and reduced development cost. They are particularly strong for content-heavy applications, e-commerce, media, and any product where getting users in the door quickly matters more than advanced hardware integration. ## When to Choose a PWA A PWA is often the right choice when your audience spans multiple platforms and you want a single codebase. It fits well for **content-driven products** like news, blogs, and reference tools. **E-commerce** benefits from the speed and SEO advantages. **Budget-conscious projects** can serve both mobile and desktop users without the cost of separate native builds. And startups validating an idea can launch a PWA as a rapid, cost-effective [MVP](https://app369.com/service/mvp-development/). ## Limitations PWAs have improved significantly but still face some constraints. iOS support for PWA features has historically lagged behind Android and Chrome. Access to certain device APIs (Bluetooth, NFC, advanced sensors) remains limited. And without an app store listing, you lose a discovery channel that some users rely on. ## Build a PWA with App369 At [App369](https://app369.com), our [PWA development service](https://app369.com/service/pwa-development/) delivers fast, reliable, installable web applications that reach users on every platform. Whether you need a standalone PWA or want to complement an existing [web app](https://app369.com/service/web-apps/) with offline capabilities and push notifications, we can help. [Contact us](https://app369.com/contact/) to discuss your project. ## **Related Terms ** [what is cross platform development](https://app369.com/glossary/what-is-cross-platform-development/) [what is flutter](https://app369.com/glossary/what-is-flutter/) ## **Related Services ** [pwa development](https://app369.com/service/pwa-development/) [web apps](https://app369.com/service/web-apps/) ## **Prefer a fixed price?** Fixed scope, fixed price, paid upfront. The work happens in writing; no call needed. - [**Web App MVP Sprint**from $6,000A scoped web app MVP in Vue/Nuxt or React, with a fixed quote after a $450 written scoping.](https://app369.com/fixed-price/web-app-mvp/) - [**App Fix Ticket**from $450One reproducible bug in an existing mobile or web app, diagnosed and fixed.](https://app369.com/fixed-price/flutter-firebase-bug-fix/) - [**AI-Built App Rescue**from $450A Lovable, Bolt or Cursor app checked end to end in 3 days, then its worst problems fixed at a fixed price.](https://app369.com/fixed-price/ai-app-rescue/) Start here ## **Need help with Progressive Web App (PWA)?** App369 specializes in building custom applications. Get a detailed estimate by email, usually within one business day, or book a consultation ($100 per 15 minutes, paid upfront). [**Get in Touch **→](https://app369.com/contact/) [**Get an Estimate**](https://app369.com/instant-quote/)