Progressive Web App Development
FISTA Solutions builds progressive web apps that work offline, install to the home screen, and load instantly on repeat visits — with a clear assessment of which native capabilities you would give up and whether that trade is right for your product.
- 150+
- projects delivered
- 50+
- companies served
- 99.9%
- verified uptime
- 47%
- efficiency gains
- 12+
- countries reached
What we build
What does progressive web app development include?
PWA work covers service worker and caching strategy, offline data and sync, installability and app manifest, push where supported, performance budgets, and the same accessibility and testing discipline as any production web application.
- 01
Caching and offline
Service worker strategy per route and asset type, with offline data and conflict-resolving sync.
Offline - 02
Installability
Manifest, icons, and install prompts handled correctly so the app behaves like an app when installed.
Install - 03
Push and background sync
Notifications and background sync where the platform permits, with graceful absence where it does not.
Engagement - 04
Performance
Instant repeat loads through caching, with budgets enforced in CI on mid-range devices.
Speed - 05
Platform assessment
A written statement of which native capabilities are unavailable and whether that matters for your product.
Decision
Requirements
Which requirements shape progressive web app development?
PWAs trade some platform capability for reach and install friction. Requirements cover cache correctness, honest offline behavior, platform capability differences, and update strategy so users are not stuck on a stale cached version.
| Requirement | Why it matters | How FISTA builds to it |
|---|---|---|
| Cache correctness | Stale caches serve old data and break trust. | Explicit caching strategy per resource, versioned assets, and update prompts when a new version is available. |
| Offline honesty | Pretending to be online when offline loses work. | Clear offline state, queued actions with visible status, and conflict-resolving sync on reconnect. |
| Platform differences | Capability varies by browser and OS. | Feature detection with graceful degradation, and a written capability matrix before the build. |
| Update strategy | Users can be stranded on old versions. | Version checks, update prompts, and forced refresh paths for breaking changes. |
| Accessibility and performance | Web standards still apply. | WCAG 2.1 AA criteria and performance budgets enforced in CI, as with any production web app. |
Where AI fits
Where does AI fit in progressive web app development?
AI fits PWAs like any web application, with the advantage of instant deployment: assistants over your data, document capture from the camera where supported, natural-language search, and drafting — all served from the backend so updates ship without store review.
- 01
Instant AI updates
Model, prompt, and behavior changes ship immediately without an app store review cycle.
- 02
In-app assistant
Answers and actions over your data within the permissions the application enforces.
- 03
Camera capture
Document and code capture where the browser supports it, with backend extraction and validation.
- 04
Natural-language search
Plain-language queries over application data with the query shown for verification.
Cost and timeline
How much does progressive web app development cost, and how long does it take?
Cost is driven by offline complexity and capability requirements; timeline by testing across browsers and platforms. FISTA does not quote blind: the scoping call returns a capability assessment and a phased estimate.
A PWA is usually cheaper than two native apps and more capable than a plain website, which is exactly why the capability assessment matters: it tells you whether the saving costs you something your product needs.
Offline complexity drives the estimate. A cached content experience is modest; full offline data entry with conflict resolution is a substantially larger build, and the two are priced separately.
Send the scope you have, even if it is a paragraph. You get a written brief, an architecture sketch, and a phased estimate before any commitment.
Get a scoped quoteDelivery
How does FISTA deliver custom software?
FISTA delivers custom software in four phases: a discovery sprint that turns goals into a specification with acceptance criteria, an architecture and data design with integration contracts, two-week builds with automated tests and weekly demos, and a verified release with infrastructure-as-code, runbooks, and monitoring.
- 1
Discover and specify
Workshops, process mapping, and system inventory produce a specification with acceptance criteria and a phased plan.
OutputSpecification, estimate, roadmap
- 2
Architect
Data model, service boundaries, API contracts, security, and infrastructure decisions recorded with trade-offs.
OutputArchitecture decision records
- 3
Build and demo
Two-week sprints with unit, integration, and contract tests; a demo on your environment every week.
OutputWorking increments in your repo
- 4
Verify and release
Performance and security testing against the spec, infrastructure-as-code, runbooks, dashboards, and handover or managed operations.
OutputVerified release with SLOs
Why FISTA
Why choose FISTA Solutions for progressive web app development?
FISTA builds PWAs with honest capability assessment, correct caching, and offline behavior that never silently loses work. Work is contracted through a US entity with full IP assignment.
PWAs specifics
- A written capability matrix states what is unavailable on each platform before you commit to the approach.
- Caching strategy is explicit per resource with versioned assets and update prompts, so users are never stranded on stale code.
- Offline state is visible and queued actions show status, so users always know whether their work is saved.
- Accessibility and performance budgets are enforced in CI exactly as they are for any production web application.
How FISTA engineers
- Spec-Driven Development: every deliverable starts as a written specification with acceptance criteria, so scope is testable before it is built.
- AI-native delivery: engineers direct coding agents under review gates and evaluation harnesses, compressing build time without loosening verification.
- Official Anthropic partner, with production experience across Claude, OpenAI, Google, and open-weight models, chosen per workload rather than by default.
- One accountable delivery lead, weekly demos on your environment, and code in your repositories from week one.
What you get as a client
- 150+ projects delivered for 50+ companies across 12+ countries since 2017, with 99.9% verified uptime on systems we operate.
- A US entity (FISTA Solutions Inc., Wilmington, Delaware) for contracting, invoicing, and IP assignment, with an engineering center in Faisalabad, Pakistan for cost-efficient senior capacity.
- US business-hours overlap for standups and reviews; written decision logs so nothing depends on a meeting you missed.
- Flexible engagement: fixed-scope build, embedded forward deployed engineers, or a dedicated team that you can scale month to month.
Clear answers
What buyers ask before a custom build.
Straightforward guidance for evaluating scope, fit, and the next step.
01PWA or native app?
PWA when reach, install friction, and instant updates matter more than deep platform integration. Native when the product depends on capabilities the web does not expose or on platform-specific polish. FISTA provides a written capability matrix.
02Do PWAs work offline?
Yes, with a service worker caching strategy and offline data layer. How complete that offline capability is depends on your scope, and full offline data entry with conflict resolution is a larger build than cached content.
03Can PWAs send push notifications?
On supported platforms, yes, including installed web apps on modern iOS versions. FISTA states current platform support in the capability matrix and designs graceful absence where it is missing.
04Can a PWA be listed in app stores?
In some cases through wrappers, though that reintroduces store review. FISTA advises on whether store presence is worth the trade for your product.
05How long does a PWA take?
A focused PWA typically takes a few months, similar to a web application, with offline complexity and cross-platform testing as the main variables.
Scoped in writing before you commit
Ship to every device without a store review.
Bring the product and its capability needs. The scoping call returns a capability matrix, a specification, and a phased estimate.