Glossary · Web & App Development
Progressive Web App (PWA)
Overview
What a PWA is
A progressive web app is a regular website enhanced with modern browser features so it feels like an installed app. Users can add it to their phone or desktop, open it from an icon, and use core features even with a poor or missing connection. There is no app store download and no separate iOS or Android build to maintain.
How PWAs work
PWAs rely on three main ingredients: a service worker that caches files and enables offline use, a web app manifest that defines the icon and install behavior, and HTTPS for security. Together these let the site load from cache for near-instant startup, run in a full-screen window, and re-sync data when the connection returns.
Why a business might choose a PWA
A PWA can be a cost-effective alternative to native apps when reach matters more than deep device integration. One codebase serves every platform, updates ship instantly without app-store review, and the app is discoverable through search and shareable by link. For content sites, storefronts, and tools, that often delivers most of a native app's value for a fraction of the mobile app development cost.
Where we use it
Related Zen in Tech services
How our team puts Progressive Web App to work in real projects.
FAQ
Progressive Web App — common questions
PWA vs native app, which should I build?
Choose a PWA when you want broad reach, lower cost, and instant updates from one codebase. Choose a native app when you need heavy hardware access, maximum performance, or prominent app-store presence. Many businesses start with a PWA and add native apps later.
Do PWAs work on iPhone?
Yes, PWAs run on iOS in Safari and can be added to the home screen, though Apple supports a narrower set of features than Android, such as more limited push notifications and background behavior. For most content and commerce use cases they work well.
How much does a PWA cost to build?
Cost depends on scope, but a PWA is usually cheaper than building separate iOS and Android apps because there is one codebase and no app-store overhead. A simple PWA can start small; complex, app-like products cost more.
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Knowledge hub
From our knowledge hub
All articles →What Is a Progressive Web App (PWA)?
What is a progressive web app? How PWAs work, their pros and cons vs native apps, and when a PWA is the right choice for your business.
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