What we deliver
Twara Technologies builds progressive web apps (PWAs): web applications that use modern browser capabilities to behave more like installed apps. A PWA is delivered from your web server, opens in the browser like any site, and can be added to a device’s home screen, launched full-screen and used with limited or no connectivity.
PWAs suit organisations that want an app-like experience without maintaining separate codebases for each platform, and teams whose users work in the field, on shared devices, or on connections that cannot be relied on.
Typical scope
- Assessment of required features against what browsers support on your users’ devices.
- Application architecture designed for caching, with a clear split between the app shell and data.
- Web app manifest, icons, splash and install prompts.
- Service worker covering caching strategy, offline fallback pages, update handling and, where appropriate, push notifications.
- Local storage of data with IndexedDB, plus background synchronisation and conflict resolution.
- Responsive, touch-first interface design.
- Conversion of an existing web application into a PWA, where its architecture allows.
Technologies we work with
| Component | Options | When it tends to fit |
|---|---|---|
| Framework | React with Vite or Next.js, Angular, Vue with Nuxt, SvelteKit | Chosen for your team’s skills and any existing codebase; all of these can produce installable, offline-capable apps. |
| Service worker tooling | Workbox, framework PWA plug-ins, hand-written workers | Workbox for well-tested caching strategies; hand-written workers for unusual sync logic. |
| Local data | IndexedDB, often through a wrapper library | Structured offline data and queued actions. |
| Back end | Node.js, Python, .NET or Java APIs, or a backend-as-a-service | APIs designed for idempotent retries so that queued offline actions are safe to resend. |
| Store packaging | Trusted Web Activity for Android, native wrappers | Only where a store presence is needed and store policies allow it. |
How we approach it
- Check the fit. We list the features you need and test them against browser support on the devices your users have. If a PWA will not meet the need, we say so.
- Design for offline. We decide which screens and data must work without a connection, how fresh data must be, and what users see when it is stale.
- Prototype the hard parts. Installation, offline behaviour and sync are prototyped early on real devices.
- Build. Application, manifest, service worker and APIs developed together, with releases to a staging environment.
- Test on devices. Browsers, operating systems and network conditions, including airplane mode and slow connections.
- Release. Production deployment with a controlled service worker update strategy so users are not stuck on old versions.
Quality, security and performance
- Standards-based foundations. The installable app experience is described by the Web Application Manifest, a W3C Working Draft that defines a JSON file holding the app’s name, icons, start URL, display mode and navigation scope. Offline capability comes from the Service Worker API, which MDN describes as a proxy that sits between the application, the browser and the network.
- HTTPS throughout. MDN notes that service workers are only available in secure contexts, so PWAs must be served over HTTPS (with
localhosttreated as secure for development). - Platform differences. Installation varies by platform. According to web.dev’s PWA installation guide, Chrome and Edge can install PWAs on desktop operating systems, while on iOS and iPadOS there is no browser install prompt and users add the app through the share menu. We plan onboarding and in-app instructions around these differences.
- Performance. We measure against Core Web Vitals and keep the app shell small so repeat visits load from cache.
- Security. Review against the OWASP Top 10, careful choice of what is cached on shared devices, and clearing of local data on sign-out.
- Accessibility. Interfaces designed to WCAG 2.2 at an agreed level.
Engagement options
- Feasibility and prototype. A short assessment and device-tested prototype to confirm a PWA meets your needs.
- Fixed-scope build. A defined PWA delivered to production.
- Ongoing support. Browser compatibility checks, updates and improvements through our support and maintenance service.
If you are weighing a PWA against a native app, our mobile app development team works alongside us, so both routes are weighed on their merits. Ask us for an assessment.