Top 100,000: Progressive Web Apps

This report examines the state of Progressive Web Apps (PWAs). PWAs are a new class of web applications, enabled by the Service Worker APIs. Service workers allow apps to support network-independent loading, to receive push notifications as well as to synchronize data in the background, and — together with Web App Manifests — allow users to install PWAs.

PWA Scores
Service Worker Controlled Pages

Lens

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PWA Scores

This metric tracks the median PWA score in Lighthouse. Lighthouse is popular automated tool for improving the quality of web pages.

Service Worker Controlled Pages

This metric tracks the percentage of pages that have triggered the ServiceWorkerControlledPage use counter that fires whenever a page is controlled by a service worker.