Progressive web appdevelopment services for products that live on every device.

We build web apps that load fast on weak connections, install like native apps and keep working offline. And we'll tell you honestly when a native app would serve you better.
Discuss your PWA

Not every product needs an app store listing.

Native apps mean separate iOS and Android codebases, store reviews and a download many users never make. A progressive web app opens from a link, installs in one tap and updates as soon as you deploy. For many products that's the faster way to reach mobile users, as long as you know its limits up front.

Why reaching mobile users gets expensive

01

Two native apps double the work

Separate iOS and Android codebases mean double the features, bugs and release cycles.
02

Users won't download another app

Many visitors drop off at the store page. Every step before they see value costs you users.
03

Store reviews slow every fix

An urgent bug fix waits for approval instead of going live with your next deploy.
04

Field users lose connection

Couriers, technicians and travelers hit dead zones, and an online-only app simply stops.
05

The mobile site feels clunky

Your site works on phones but loads slowly and doesn't feel like an app, so people don't return.
06

PWA limits found too late

Teams start a PWA, then discover mid-project that a key feature behaves differently on iOS.

Signs a PWA is the right call

If several of these match your product, a progressive web app may serve you better than native apps.

1

Most users arrive from search or links

People find you on the web, and sending them to a store first adds friction.

2

Data must be available offline

Forms, catalogs or schedules need to work in a warehouse, a basement or on a plane.

3

Users come back often

A home screen icon and timely reminders would bring them back faster than a bookmark.

4

Budget covers one codebase

Separate web, iOS and Android teams are out of reach, but mobile users still matter.

5

You ship updates every week

You want every user on the latest version without waiting for store approval.

6

Your device needs are basic

Camera, location and notifications cover your use case. Deep hardware access doesn't matter.

What we do

Our PWA development services

PWA vs native assessment

We review your users, features and budget and recommend a PWA, native apps or a mix.

New PWA development

Installable web apps in React and Next.js, designed mobile-first and fast on any screen.

Offline mode and sync

Service workers, local storage and sync logic so data survives a lost connection.

Push notifications

Web push for reminders and updates, set up for each browser and platform you support.

Website to PWA conversion

A manifest, a service worker and app-like navigation added to your existing web app.

Mobile performance

Fast loads on weak networks and mid-range phones through caching and lean bundles.

Backend and APIs

Node.js or Python APIs, authentication and data sync built for offline-first clients.

Maintenance and updates

Fixes, new features and adjustments as browsers change after launch.

PWA or native app?

We help you choose before any code is written. This is how we usually see the trade-off.

A PWA fits when

Users find you through search and shared links

The app is mostly content, forms and data

Offline access and reminders matter

One team must cover web and mobile

You release updates often

Native fits when

You need Bluetooth, background tasks or other deep hardware access

A store listing is part of your marketing

Heavy graphics or complex animations are core to the product

Reliable background behavior on iOS is critical

A mix fits when

Customers use a PWA, staff use a native tool

You launch as a PWA and go native once demand is proven

One set of APIs serves both

Technologies behind our PWAs

Modern web tooling on the client, and a backend designed to sync with devices that go offline.

React
Next.js
TypeScript
JavaScript
HTML5
Redux
Node.js
NestJS
PostgreSQL
MongoDB
AWS
Who is this for

For products that need mobile reach without native overhead

Startups testing mobile demand

Reach phone users fast, then decide on native apps once the numbers justify them.

E-commerce and marketplaces

Fast mobile storefronts that install and bring shoppers back with notifications.

Field and operations teams

Inspection, delivery or sales tools that work offline and sync when the signal returns.

Companies with a web product

Your web app already works. A PWA layer makes it feel native on phones.

What should your PWA do?

Work offline

Keep key screens and forms usable without a connection.

Install in one tap

An icon on the home screen, no store required.

Send notifications

Remind, update and re-engage your users.

Load fast on mobile

A quick first load, even on slow networks.

Replace separate apps

One codebase for phones, tablets and desktop.

Upgrade your web app

Turn what you already have into an installable app.

How we build a PWA

01

Assessment

We check your users, devices, features and budget, and confirm a PWA is the right fit before you commit.

02

Offline and data plan

We decide what must work offline, how data syncs and how conflicting edits get resolved.

03

Design and build

Mobile-first screens, a service worker and an API built for unreliable networks, delivered in sprints.

04

Device testing

Install, offline mode, push and performance tested on real iPhones, Android phones and desktop browsers.

05

Launch and iterate

We release, watch usage and errors, and ship updates without waiting for store reviews.

How we work

Choose how to start

Discovery Sprint

2 weeks to settle PWA vs native and plan the build

Fixed price, with a plan and an estimate.

For teams still deciding between a PWA and native apps.

Feature and device requirements review

PWA vs native recommendation

Offline and sync approach

Prioritized scope for the first release

Estimate and timeline

Start with discovery

PWA build

most popular

A team that designs, builds and launches your PWA

Fixed price after discovery, or a monthly team.

For products with a clear case for a progressive web app.

UI/UX design for mobile and desktop

Offline mode, install and push

Backend and API work

Testing on real devices

Support after launch

Plan your PWA

Web and mobile products we've shipped

Healthcare

Medical Lab Web and Native Mobile Applications

+30%
lab test orders
Read the case study →
Retail · Startup

Mobile application for Grocery shops

700+
stores aggregated
Read the case study →
Education

Educational platform for a private school

Read the case study →

Make the most of the experienced team

We are a global team of
creative
and
strategic thinkers
who specialize in building custom digital products
from scratch. Our main goal is to
deliver high-quality solutions
that meet our clients' needs.
We are a global team of
creative
and
strategic thinkers
who specialize
in building custom digital products
from scratch. Our main goal is to
deliver high-quality solutions
that
meet our clients' needs.
Learn more
85%
recurring customers
12M
the biggest fundraising round by one startup
X3 MRR
growth of partner's business in 5 mos
2 weeks
for project start
5+ years
av. partnership duration with SMBs and product companies

Why Gilzor

As a PWA development company that also builds native iOS and Android apps, we have no reason to push one option over another. We recommend what fits your users and your budget.

What we bring

Web and mobile in one team

We build web, native and cross-platform apps, so the advice stays balanced.

Fast start

A team can start in about two weeks.

Delivery record

70+ products launched, 98% delivered on time.

Design included

UI/UX designers who think mobile-first.

Returning clients

85% of our customers come back with new work.

What makes us different

Honest PWA vs native advice

If native is the better call for you, we'll say so.

Real-device testing

Install, offline and push checked on phones and desktops, not only in an emulator.

Offline-first thinking

Sync and conflicts are planned up front, not patched in later.

A codebase you own

Code in your repositories, documented for your team.

Overlap with US hours

Our engineers in Europe overlap with part of the US working day.

What our clients
frequently ask

What is a progressive web app?

A web app that can be installed on a phone or computer, keeps working offline and can send push notifications. It runs from a URL, so there's no store download or review.

Do PWAs work on iPhones?

Yes. Users add a PWA to the home screen from Safari and it opens full screen like an app. Web push on iOS works once the app is added to the home screen. Some features, such as background sync, are more limited than on Android, so we plan around them.

When should we build native apps instead?

When you need deep hardware access, reliable background tasks, heavy graphics or a store presence. We often suggest starting with a PWA and adding native apps once demand is proven.

Can you turn our existing website into a PWA?

Usually, yes. We add a web app manifest, a service worker and offline handling, and adjust navigation and performance for mobile. A short review tells us how much work that is for your codebase.

Can a PWA be listed in app stores?

In some cases. Google Play and the Microsoft Store accept packaged PWAs. Apple's App Store needs a native wrapper and passes a stricter review, so we look at it case by case.

How is PWA development priced?

Fixed price after a Discovery Sprint, or monthly per engineer if you want an ongoing team. Tell us about your product and we'll share an estimate.

No sales pitch

Tell us about your app

Describe your users, their devices and the features you need. We'll tell you whether a PWA fits and what it would take. If native is the better call, we'll say so.

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