A PWA is marketed as a "mobile app without an App Store." The wording is convenient, but it misses the point: a PWA is a set of browser technologies on top of your site, not a standalone product. If the site under them is slow, without a sitemap and without markup, a PWA will not save anything. If the site is OK - PWA adds a few specific things and it's better to know about them before paying for development.
Below is a breakdown of the mechanisms: what exactly changes technically, where does the benefit come from, and where is the limit beyond which there is no benefit.
What is a PWA technically
Three components, without which the browser will not consider the site as an application:
- HTTPS is a mandatory condition, otherwise the service worker will not be registered;
- web app manifest — a file that describes the name, icons, starting address and display mode (`standalone' is the same "opens without an address bar");
- service worker is a script that stands between the page and the network and is able to deliver saved copies of files when the network is unavailable or slow.
All. No packaging, no signature with a certificate, no review by a moderator. The site remains a site - just the browser gets the right to show it as an application.
In our practice, the manifest is also connected to combat projects: in the SaaS platform for rewriting product descriptions, the PWA manifest works with a TTFB of 220.6 ms and 141 KB of HTML on the main page (our measurement, 07/31/2026). This, by the way, shows the order of work: first a quick return of the page, then a manifest on top of it.
What makes a PWA really different from a native app
The release comes out on the same day
The native build must be assembled, signed, sent to the review and wait for publication - separately in the App Store, separately in Google Play. In PWA, a new release does not exist as an event: you rolled out the site, the service worker pulled the updated version the next time you open it. Fixing a checkout bug takes hours, not weeks, to reach the user.
Hence the arithmetic of the cost, without imaginary percentages: one code base instead of two native ones plus the absence of a cycle of releases in stores. Exactly how much this will save in your case depends on what you were going to do in the application in general.
Installation takes place from your own website
The person is already on the product page. To install a native application, she needs to go to the page, find you among similar titles, wait for the download and re-authorize. To install PWA, click "Add to home screen". The number of steps between intent and installation is different, and that's a real difference in mechanics, not an advertising slogan.
Important correction: in Safari on iOS, the browser does not show an automatic invitation to install. The user must open the "Share" menu and select "To the Home screen". That is, on the iPhone, installation occurs only when you directly explained to the person that it is possible and showed how.
