Progressive Web App Agency — Native Feel, Web Speed

A PWA is a web application that uses modern browser APIs to deliver app-like experiences — installable on the home screen, works offline, receives push notifications, and loads instantly. PWAs are built with standard web technologies but behave like native apps on supported devices.

PWAs are the right choice when you want cross-platform reach (iOS, Android, desktop) from a single codebase, lower development and maintenance costs, no app store approval friction, and direct URL sharing. Native apps are better for deep OS integration, AR/VR, or when app store discoverability is critical.

Yes, with limitations. Safari on iOS supports service workers, offline caching, and home screen installation. Push notifications via the Push API are supported on iOS 16.4+. Background sync has limited iOS support. Kultrix designs PWAs to degrade gracefully on iOS while delivering the full experience on Android and desktop.

We use a service worker with a cache-first strategy for static assets and a network-first strategy for dynamic API data. For offline data access, we sync data to IndexedDB on initial load and use background sync to replay failed mutations when connectivity resumes.

Web push uses the Push API and service workers. After the user grants permission, your server can send push messages via the Web Push Protocol even when the browser is closed. We set up a push server (using web-push library), store subscriptions securely, and send targeted notifications.

PWAs can match native app perceived performance through app shell caching (instant loading), skeleton screens, optimistic UI updates, and preloading the next likely screen. With a service worker, repeat visits load from cache before the network — often faster than a native app launch.

Yes. Adding PWA capabilities to an existing site typically requires: a valid Web App Manifest, a registered service worker with caching strategy, HTTPS, and responsive design. Kultrix audits your current site and implements these incrementally without a full rebuild.

A service worker is a JavaScript file that runs in the background, separate from your web page. It intercepts network requests, enabling offline caching and background sync. It is also the mechanism behind push notifications. Service workers only run on HTTPS domains.

We implement a service worker update flow that detects new versions, prompts users to refresh, and activates the new service worker immediately on confirmation. This prevents users from staying on stale cached versions while ensuring updates are not disruptive.

Yes — PWAs are indexed by search engines like any website. Because they are server-rendered or statically generated (not SPA-only), Google's crawler sees real HTML content. This makes PWAs a superior choice to native apps for SEO-driven acquisition strategies.

We run Lighthouse PWA audits targeting 100/100 on the installability and reliability criteria, measure Time to Interactive and Largest Contentful Paint with real user monitoring, and track install prompt acceptance rate and push notification opt-in rates as engagement KPIs.

A PWA conversion of an existing web app takes 2–4 weeks. Building a new PWA from scratch takes 8–14 weeks depending on offline complexity and feature set. Kultrix delivers a Lighthouse-audited, production-ready PWA with documented service worker patterns.