Progressive web app development

Progressive Web App development is the right call when install friction is a real cost, when update speed matters more than the deepest device features, and when reach across a wide device mix matters. A PWA gives users an installable, offline-capable app through the browser, on one codebase, with no app store review between a release and the user.

For regulated fintech, that codebase advantage is concrete. One team builds the PWA and the native iOS and Android wrappers around it, which typically cuts team cost by around 30% against maintaining separate native apps. The product still reaches both the web and the app stores from a single core.

The PWA developers who get this right understand the regulated layer as well as the browser. A lending or onboarding PWA still needs strong authentication, KYC capture and an audit trail. That backbone is the difference between a real product and a brochure that happens to install.

A PWA is not a website with a manifest stapled on. The ones that succeed are run with the discipline of a production mobile product, and the ones that fail are run as websites with an install prompt.

Four things decide the outcome:

• Performance budget and offline behaviour designed from the start, not retrofitted at the end.
• Continuous testing on iOS, where install, storage and push behaviour are narrower than on other platforms.
• A real integration backbone behind the surface: identity, audit trail and consent, not just screens.
• A clear update strategy, so a release reaches users without breaking the cached version they already have.

For the broader mobile question across native and PWA, see mobile app development; for a web product that does not need the installable shape, see custom web solutions.

Service workers carry the offline behaviour, the caching strategy and the update flow. We design cache invalidation against the regulated context, so a stale balance or an out-of-date consent screen never reaches the user.

Web push, installable shells and device access such as camera and biometrics are all in scope, with clean fallbacks where a browser does not support them. iOS support is narrower than Chromium, so we test it continuously rather than discovering the gaps at the end.

When a store presence is needed for brand or trust reasons, the same PWA core ships inside a thin native wrapper, a trusted web activity on Android and a native shell on iOS, and goes to the app stores without a second codebase. The user gets a store listing; your team still maintains one product.

A PWA build usually runs as a fixed-price first phase against a clear specification, with the offline behaviour, the install flow and the security model defined up front. Where the product is still finding its shape, a short discovery on time and material settles the unknowns before the fixed scope is set.

The native wrappers, when a store presence is needed, are priced as an extension of the same codebase rather than a second project. Because one team owns the PWA and the wrappers, the commercial model stays simple and the second platform costs a fraction of the first.

Most PWA builds do not start from zero. If you already run a responsive web product, the move is incremental: we audit what exists, add the installable shell and the service worker around the flows that earn them, and harden offline behaviour for the journeys that must survive a dropped connection. The URLs your users and your search traffic already rely on stay where they are.

If the starting point is a pair of native apps that cost too much to maintain, the move runs the other way. The integration backbone - identity, audit trail and consent - stays exactly where it is; the surface is rebuilt as a PWA against it; and the native apps retire only when the PWA demonstrably carries the traffic. Both surfaces run side by side until the numbers say the old one can go.

Either way, the migration is staged rather than a single cutover. Each release is small enough to roll back, the version a user already holds keeps working until the new one is safely in place, and nothing in the regulated layer - authentication, KYC, the audit trail - is rewritten just because the surface changed shape.

Everything a PWA does for the installed user, it also does for the user who just clicked a link. Every screen has an address, so a campaign, a partner referral or a support reply can land someone directly inside a flow - no store page, no download, no second decision point between the click and the product. That matters most where acquisition is the battle, as it usually is in lending and onboarding. In practice it gives you:

• Indexable public pages where the flow allows it, so search traffic lands on the product.
• Deep links that survive install and open the same screen in the installed app.
• Campaign links measurable end to end, from first click to completed flow.
• One analytics view across the browser and the installed shell.

The install then becomes a moment you choose, prompted when the user has a reason to return, rather than a tollgate at the front door. Users who install get the offline shell and push where the platform supports it; users who never install still get the full product. Both run on the same codebase the rest of this page describes.