Progressive Web Apps (PWA): an alternative to a native app

Progressive Web Apps (PWA): an alternative to a native app

A Progressive Web App (PWA) is a website that can behave almost like a native app – it installs to the home screen, works without an internet connection, and sends push notifications. For many companies in Slovakia, it's a cheaper and faster route to a mobile experience than building separate native apps for iOS and Android. The question more and more businesses are asking is: when is a progressive web app genuinely enough, and when is it worth investing in a native app?

In this article, we'll look at what PWA technology actually enables, where its limits lie, and what criteria can help you decide.

A PWA isn't a single technology but a set of web standards that together give an ordinary website the characteristics of an app. The three key components are:

• Service Worker – a script that runs in the background in the browser, caching data and enabling the app to work even on a poor or non-existent connection.
• Web App Manifest – a JSON file that defines the icon, name, colours and how the app launches once installed from the home screen.
• HTTPS and responsive design – a PWA must run over a secure connection and adapt to any device.

Thanks to this, a user can "install" a PWA directly from the browser without going through the App Store or Google Play; the app launches in its own window with no address bar, and in many cases it also works offline. The exact technical specification for manifests and service workers is described by Google's web.dev.

In practice, that means one codebase for both the web and the app for a business – not three separate projects for web, iOS and Android.

The choice between a PWA and native development depends on what the app needs to do and which devices it has to work with. The table below summarises the main differences.

This difference in access to native features is why companies with heavy hardware requirements (such as AR, Bluetooth peripherals, or demanding background processing) turn to native development, or at least a cross-platform framework. We cover the comparison of native and cross-platform approaches using React Native in our article on mobile app development: native vs cross-platform.

The main advantages of a progressive web app can be summed up in a few points:

• One codebase for every platform. A change is deployed once and takes effect immediately for all users – with no waiting for app-store approval.
• A lower barrier for users. There's no need to download the app from a store – users just click "add to home screen" directly from the browser.
• SEO visibility. Unlike a native app, PWA content is indexable by search engines, so it also works as a regular website.
• Simpler testing and deployment. Changes are verified in a single environment rather than separately for iOS and Android.
• A faster first impression. Users can try the app directly in their web browser without installing it, and only decide afterwards whether to "add it to the home screen".

It's precisely this combination of a single codebase and fast deployment that makes a PWA worth considering for projects where the main goal is to validate demand quickly or reach a wider audience without needing two separate native teams.

A PWA is a good choice especially in these situations:

• The app is mainly used for displaying content, placing orders, making bookings or managing an account – in other words, standard CRUD operations without demanding graphics.
• The target audience predominantly uses Android or desktop, where PWA support (including push notifications) is most complete.
• The business needs both an app and a website at the same time and doesn't want to maintain three parallel codebases.
• It's an internal tool for employees, where a presence in the App Store isn't required.

Conversely, native development or a cross-platform solution makes sense if the app needs deep access to the phone's sensors, offline processing of large amounts of data directly on the device, reliable push notifications on iOS, or if the app is the company's core product and its presence in app stores carries marketing value.

A PWA isn't a universal solution, and it has real limitations that are worth knowing before you decide:

• iOS Safari has long restricted certain PWA features – push notifications in particular were only supported on iOS in more recent versions of Safari, and they still come with more limitations than on Android. Current support status is tracked by MDN Web Docs.
• Access to native APIs (such as Bluetooth, NFC, advanced sensors) is more limited on the web than in a native SDK.
• Visibility in app stores – a PWA can be published to some app stores, but it doesn't work as smoothly as a native app, and it isn't always desirable from a marketing-strategy perspective.

The chart below illustrates the general principle – how much separate implementation work covering multiple platforms typically requires for a PWA compared with two separate native apps (an illustrative index, not real data from a specific project):

The actual scope of work always varies depending on the size of the app, the number of integrations and the native features required – the chart simply illustrates the principle of one codebase versus two parallel ones.

When choosing between a PWA and a native app, it helps to answer three questions: which native features does the app actually need? Which devices does the target audience use? And how important is the app's presence in the App Store or Google Play for brand credibility? The answers will usually show whether a progressive web app is a sufficient solution, or whether it's better to go down the native or cross-platform route.

If you're not sure which direction makes the most sense for your project, take a look at our software development solutions or mobile app development, and arrange a no-obligation consultation via our contact form.