Progressive Web App Development —
Native-Like. No App Store.
PWAs deliver installability, offline access, and push notifications at a fraction of native app cost. Built on Next.js with Workbox service workers — one codebase for Android, iOS, and desktop.
PWA Capabilities We Build
Installable on Home Screen
PWAs can be added to the home screen on Android and iOS — no App Store required. Users get an app icon that opens the PWA in a full-screen, standalone window without the browser UI. Android prompts installation automatically when conditions are met.
Offline Functionality
A service worker caches pages, assets, and API responses. Users can browse previously visited pages, view product catalogues, and access key features with no internet connection. Background sync queues form submissions made offline for sending when connectivity returns.
Web Push Notifications
Send push notifications to users who've installed the PWA — even when the browser isn't open. Push notifications on Android work identically to native app notifications. iOS 16.4+ supports web push for installed PWAs.
Background Sync
Forms, orders, and data captured offline are queued and sent automatically when the user reconnects. No data loss. Useful for field apps, delivery tracking, and order submission in low-connectivity environments.
App-Like Navigation
Smooth page transitions using the View Transitions API, gesture-based navigation, and a custom install prompt flow. The PWA feels like a native app — not a browser with the UI stripped away.
Performance-First Architecture
PWAs built on Next.js with static generation, image optimisation, code splitting, and Workbox service worker precaching. Core Web Vitals pass. First load under 1.5s. Subsequent navigation near-instant due to service worker cache.
PWA vs Native App
| Feature | PWA ✦ | Native App |
|---|---|---|
| App Store distribution | No — direct URL install | Yes — App Store / Play Store |
| Offline support | Yes — service worker cache | Yes — native caching |
| Push notifications | Yes (Android full, iOS 16.4+) | Yes — full support |
| Device API access | Limited (camera, GPS, biometric) | Full access |
| Development cost vs native | 50–70% lower | 100% baseline |
| Update mechanism | Instant — service worker update | App Store review required |
| Discoverability | SEO + Google indexing | App Store search only |
| Best for | Content, ecommerce, low-connectivity apps | AR, ML, hardware-heavy apps |
Technology Stack
What Our PWA Clients Say
"We built a PWA for our field sales team — 50+ reps across India with unreliable connectivity. The offline sync works perfectly. Orders submitted in areas with no signal arrive in our backend the moment they reconnect. It replaced a native Android app."
"Our ecommerce PWA loads in 0.9 seconds on 4G and works offline for product browsing. We added to home screen conversion at 12% — users treat it like a real app. Our bounce rate dropped by 40% compared to the mobile website."
"We wanted the engagement of push notifications without the cost and complexity of a native app. The Sigill PWA delivers exactly that — push notifications work on Android exactly like native, and the install rate on first visit is 8%."
Frequently Asked Questions
A PWA is a web application that uses modern browser APIs to deliver app-like capabilities — offline access, installability (add to home screen), push notifications, and background sync. PWAs are built with standard web technologies (HTML, CSS, JavaScript) and are accessed via a URL, not an app store. The key components are: (1) a web app manifest (tells the browser the app's name, icon, and display mode), and (2) a service worker (a background JavaScript file that enables caching and offline functionality).
Choose a PWA when: (1) you need cross-platform coverage (works on Android, iOS, and desktop from one codebase), (2) you want app-like features without App Store distribution, (3) your budget doesn't support native iOS + Android development, (4) SEO matters — PWAs are indexable by Google unlike native apps, (5) your app's core functionality is content, ecommerce, or data forms rather than hardware-intensive (AR, ML, Bluetooth). Choose native when: you need full hardware API access (ARKit, Core ML, Bluetooth LE, NFC on iOS) or the best possible iOS push notification experience.
Yes — PWAs work on iPhone and are installable via Safari. iOS 16.4+ supports Web Push Notifications for installed PWAs (added to home screen). Service workers and offline caching work fully on iOS. The main iOS limitation is that the install prompt doesn't appear automatically — users must use the Share button and 'Add to Home Screen' manually. We implement a custom overlay that prompts iOS users to install the PWA.
A PWA built on an existing Next.js web app (adding service worker, manifest, offline caching, and push notifications) typically costs ₹80,000–₹2,00,000. A PWA built from scratch as the primary product (designed, developed, with full offline sync and push notifications) typically costs ₹2,50,000–₹6,00,000. All projects are fixed-price.
Yes — Web Push API enables push notifications from PWAs. On Android, push notifications from an installed PWA look and behave identically to native app notifications. On iOS 16.4+, push notifications work for PWAs added to the home screen. We integrate Firebase Cloud Messaging (FCM) as the push notification backend, which handles both Android and iOS Web Push.
Yes — offline capability is one of the core PWA features. A service worker caches static assets (HTML, CSS, JS, images) and API responses. We configure caching strategies based on content type: cache-first for static assets (CSS, JS), network-first with offline fallback for API data, and stale-while-revalidate for content pages. Background Sync queues any data (form submissions, orders) captured offline for sending when connectivity returns.
A regular mobile website requires active internet connectivity, can't be installed to the home screen without browser UI, and can't receive push notifications. A PWA adds: (1) a service worker that enables offline caching and push notifications, (2) a web app manifest that enables installation and standalone display mode (full screen, no browser UI). The user experience of a PWA is significantly closer to a native app than a regular mobile website.
Yes — if your site is built on Next.js, adding PWA capabilities typically takes 2–4 weeks: we add the web app manifest, implement the service worker with appropriate caching strategies, add push notification opt-in flow, and configure offline fallback pages. If your site is on WordPress or another CMS, we add a service worker via JavaScript that handles caching and offline, and add the manifest file.
Let's Build Your PWA
Tell us what app experience you need — offline, push, or installable. We'll scope the PWA and send a fixed-price proposal within 24 hours.