What is PWA?

What Is a Progressive Web App

A PWA is a web application that uses modern browser technologies (Service Workers, Web App Manifest, Cache API) to deliver a user experience close to native mobile applications. A PWA can be installed on a smartphone’s home screen, works offline, sends push notifications, and loads instantly.

Technologies Under the Hood

The key PWA technology is the Service Worker, a script running in the background of the browser. It intercepts network requests, caches resources, and ensures the application works without internet access. Web App Manifest is a JSON file describing icons, colors, and application behavior upon installation. Cache API and IndexedDB allow storing data locally for offline access.

PWA vs Native Applications

PWAs do not require publishing in the App Store or Google Play (though this is possible via TWA), update instantly without downloading from a store, take up minimal space on the device, and work on all platforms from a single codebase. However, PWAs have limitations in accessing device hardware features (Bluetooth, NFC, certain sensors) and are not suitable for tasks requiring maximum performance (3D graphics, AR/VR).

When Webparadox Recommends PWA

PWA is the optimal choice for content platforms, e-commerce, corporate tools, and service applications where audience reach matters without the barrier of app store installation. We use Workbox for cache management, configure offline access strategies, and optimize Lighthouse metrics to achieve maximum performance scores.