Progressive Web App Development
Google reports PWAs deliver 3x faster load times and 68% higher engagement compared to mobile websites. App369 builds installable, offline-first Progressive Web Apps that combine the reach of the web with the experience of a native app — no app store required.
Mobile, web, UX, consulting, and AI delivery under one product engineering team.
Full-stack product delivery across mobile, web, UX, consulting, and AI.
PWA Development Services
Offline-First PWA Development
PWAs that work without an internet connection using service workers and IndexedDB for local data storage. According to Google, 53% of users abandon sites that take over 3 seconds to load — our offline-first architecture ensures instant loading regardless of network conditions.
Service Worker Implementation
Custom service worker strategies using Workbox for intelligent caching, background sync for deferred actions, and periodic background fetch. We implement cache-first, network-first, and stale-while-revalidate patterns based on your content type.
Push Notifications
Web push notifications for re-engagement that work on Android, iOS (since iOS 16.4), and desktop browsers. According to Airship, web push notifications achieve 7x higher opt-in rates than native app prompts because they require no app download.
App Shell Architecture
Instant-loading app shell pattern that caches the UI framework and loads dynamic content on demand. This architecture delivers sub-second initial load times and smooth navigation that feels indistinguishable from a native app.
Web App Manifest Configuration
Complete manifest configuration for home screen installation, splash screens, theme colors, and display modes. We configure standalone display mode for full-screen app experience and shortcuts for quick actions directly from the home screen.
Advanced Cache Strategies
Sophisticated caching with Workbox including runtime caching, precaching of critical assets, cache versioning with automatic cleanup, and range request handling for media. Our strategies minimize bandwidth usage while ensuring content freshness.
Our Process
Discovery & PWA Strategy
We analyze your business goals, target audience, and offline requirements to determine the optimal PWA architecture, caching strategy, and feature set for maximum engagement.
UI/UX Design
Our designers create responsive, app-like interfaces that work consistently across desktop, tablet, and mobile with touch-first interactions, smooth transitions, and offline state handling.
PWA Development
Our developers build your PWA using Vue.js and Nuxt with Workbox for service worker management, implementing app shell architecture, background sync, and push notification integration.
Performance & Offline Testing
Testing with Lighthouse for PWA compliance scoring, Chrome DevTools for service worker debugging, and real-device testing across browsers to ensure consistent offline behavior and sub-second load times.
Deployment & Distribution
We deploy your PWA to a CDN with HTTPS, configure the web app manifest for installability, and optionally publish to Google Play Store via Trusted Web Activity (TWA) for additional distribution.
Monitoring & Optimization
Ongoing performance monitoring with Core Web Vitals tracking, service worker updates, cache invalidation management, and iterative improvements based on user engagement analytics.
Frequently Asked Questions
What is a Progressive Web App (PWA)?
According to Google's web.dev documentation, a Progressive Web App is a web application that uses modern web capabilities to deliver an app-like experience. PWAs are installable on the home screen without an app store, work offline using service workers, support push notifications, and load instantly with app shell architecture. Companies like Starbucks, Pinterest, and Twitter have reported 2-3x increases in engagement after launching PWAs.
PWA vs native app: which should I choose?
According to Google, PWAs cost 3-4x less to develop than native apps and reach users without app store friction. Choose a PWA if you need broad reach across all devices, SEO visibility, and lower development costs. Choose a native app if you need advanced hardware access (Bluetooth, NFC, ARKit), App Store/Play Store distribution, or maximum performance for graphics-intensive features. App369 can also build a PWA alongside a native Flutter app for maximum coverage.
How much does PWA development cost?
According to Clutch's 2024 survey, PWA development typically costs $15,000-$80,000 depending on complexity. Simple PWAs with offline support and push notifications cost $10,000-$25,000, medium-complexity PWAs with real-time data sync and complex caching run $25,000-$50,000, and enterprise PWAs with advanced features cost $50,000-$100,000. PWAs are generally 3-4x cheaper than building equivalent native iOS and Android apps separately.
Do PWAs work offline?
Yes. According to MDN Web Docs, PWAs use service workers to cache assets and data, enabling full offline functionality. Service workers intercept network requests and serve cached responses when the network is unavailable. Strategies include cache-first for static assets, network-first for dynamic content, and stale-while-revalidate for balanced freshness. IndexedDB provides offline data storage for complex datasets. App369 implements Workbox for robust caching strategies.
Which browsers support PWAs?
According to Can I Use, PWA core features (service workers, web app manifest, HTTPS) are supported by all major browsers: Chrome, Edge, Firefox, Safari, and Samsung Internet — covering over 97% of global users. Apple added full PWA install support to Safari on iOS in 2023, including push notifications and badging. App369 implements progressive enhancement to ensure the best possible experience on each browser.
Can PWAs access device features like camera and GPS?
Yes. According to the W3C Web Platform, modern PWAs can access the camera (MediaDevices API), geolocation (Geolocation API), accelerometer and gyroscope (DeviceMotion API), file system (File System Access API), and share functionality (Web Share API). Push notifications are supported on both Android and iOS (since iOS 16.4). Bluetooth and NFC access is available in Chromium-based browsers.
Web Reach, App Experience
PWAs eliminate app store friction and work on every device with a browser. Learn more about why PWAs outperform traditional mobile sites, or get a free consultation and detailed estimate within 2 business hours.