PWA (Progressive Web App)
A Progressive Web App is a web application that behaves like a native app, with offline functionality, push notifications, and home screen installation.
What is a PWA?
A Progressive Web App (PWA) is a web application that behaves like a native app on your phone or computer. The technology uses Service Workers — background processes that cache content, enable offline access, and handle push notifications. Additionally, a PWA contains a Web App Manifest that defines the icon, name, and home screen behavior. The result is an app that can be installed directly from the browser, without downloading from the Apple App Store or Google Play Store.
How does a PWA work?
A PWA works by combining three core technologies. First, a Service Worker ensures the app stores files and data locally (caches), so the app loads quickly and offers basic functionality even without an internet connection. Second, the Web App Manifest defines how the app looks when installed: the home screen icon, name, color scheme, and whether the app opens fullscreen. Third, HTTPS is mandatory, guaranteeing all communication is encrypted. Together, these technologies create an app-like experience in the browser.
Example
An event organizer uses Wabber's ABBR-App to track participants. Visitors scan a QR code with their phone upon arrival and are asked if they want to install the app. One tap and the PWA is on their home screen — no app store, no downloading tens of megabytes. During the event, the app works even when WiFi drops out, thanks to the Service Worker's offline caching. Organizers receive real-time attendance data in their dashboard.
Why is a PWA important?
A PWA is important because it bridges the gap between websites and native apps. Companies no longer need to develop separately for iOS and Android — one codebase works everywhere. This saves development time, reduces maintenance costs, and accelerates time-to-market. For users, it means a lower barrier: no app store visit, no large downloads, direct access. Wabber applies PWA technology in products like the ABBR-App and Digitaal Aanmelden, giving end users at events and in business environments an immediate fast, reliable experience.
Related solutions
Frequently asked questions
What is the difference between a PWA and a native app?
A native app is built specifically for one platform (iOS or Android), downloaded via an app store, and has full access to device features. A PWA is a web application installed through the browser that works on all platforms. PWAs have access to many device features (camera, GPS, push notifications) but not all. The big advantage: one codebase, no app store approval needed, and instant updates.
Does a PWA work offline?
Yes, a PWA can function offline thanks to Service Workers that cache content and data locally. The extent of offline functionality depends on the design: a simple informational app can work fully offline, while an app requiring real-time data offers more limited offline capabilities. Wabber designs the caching strategy based on usage, ensuring the app always provides a usable experience — even without connectivity.
Can Wabber convert an existing website into a PWA?
Yes, an existing website can be enhanced with PWA functionality. This includes adding a Service Worker for caching and offline access, a Web App Manifest for the installation experience, and optimizations for speed and performance. Wabber analyzes the current website and advises which PWA features add the most value for your specific target audience and use case.
Does a PWA support push notifications?
Yes, PWAs support push notifications on Android and desktop browsers. On iOS, support is available from iOS 16.4 onwards. Push notifications are handled via the Service Worker and the Push API. Wabber implements push notifications in our PWA solutions when relevant, for example for notifying event visitors or alerting warehouse staff about urgent orders.
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