Progressive Web Apps: When a Website Can Replace an App

A progressive web app (PWA) is a website built to behave like an app: it can be installed on the home screen, open full-screen, cache content for limited offline use, and send notifications, all without an app store. For customer portals, dealer ordering, internal tools and content-rich services, a PWA often delivers most of the benefit of a native app at a lower cost and with instant updates.

What a PWA can do

• Install from the browser with an icon on the home screen.
• Open without browser controls, looking like an app.
• Work on any device: Android, iPhone, tablets and computers from one codebase.
• Cache pages and data so key screens load quickly and some content works offline.
• Send push notifications, on Android and, with some conditions, on iPhone.
• Use the camera for photos and scanning, and location in the foreground.
• Update instantly for every user when you deploy.

What it cannot do as well

• Heavy offline work with large data and reliable background sync.
• Background location tracking.
• Bluetooth and specialised hardware access, which varies by platform.
• Some iPhone capabilities, where Apple's support for web features lags Android's.
• App store presence, if customers expect to find you there.

Comparison

| Factor | PWA | Native or cross-platform app | | --- | --- | --- | | Build cost | Lower | Higher | | Updates | Instant | Store review | | Offline | Limited | Full | | Device features | Basic to moderate | Full | | Discoverability | Search engines, links | App stores | | Installation friction | Low | Store download | | Maintenance | One codebase, web only | App plus store requirements |

Good fits for a PWA

• Dealer and distributor ordering portals used from phones in shops.
• Client portals for status, documents and payments. See building a client portal.
• Internal tools for office and light field use.
• Booking and appointment systems.
• Education portals for students and parents.

Poor fits

• Field apps in low-coverage areas needing full offline sync. See offline-first apps.
• Apps connecting to equipment by Bluetooth.
• Consumer products where store presence and native polish matter.

Encouraging installation

A PWA only feels like an app once it is on the home screen. To help users get there:

• Show a short, well-timed prompt after someone has used the portal a few times, not on the first visit.
• Explain the benefit in one line, such as "Add to your home screen to reorder in two taps".
• Include simple instructions for iPhone, where installation is through the share menu.
• Send the link by WhatsApp or SMS so users open it on their phones in the first place.

Even without installation, a fast, mobile-friendly PWA works well from a bookmarked link, so installation is a bonus rather than a requirement.

Search visibility bonus

Unlike native apps, PWA pages can be indexed by search engines where appropriate, so public content such as product catalogues or help pages can bring in visitors.

Making the decision

Ask three questions:

1. Do users need full offline work or background location? If yes, build an app.
2. Do they need special hardware access? If yes, build an app.
3. Otherwise, start with a PWA and measure usage. Build a native app later only if data shows it is needed.

See mobile app or mobile-friendly web app and WhatsApp or a dedicated app for related decisions.

Frequently asked questions

Do PWAs work on iPhone?

Yes, with some limitations compared with Android. Installation and notifications work in recent iOS versions, with certain conditions.

Can a PWA be listed in app stores?

Some can be packaged for Google Play. Apple is more restrictive. If store presence matters, plan for a native or cross-platform app.

Are PWAs secure?

They run over HTTPS with the same security practices as any web application.

How long does a PWA take to build?

Similar to a responsive web application of the same scope, usually two to four months for a focused portal.

Choose the right build

Turbo Bytes Consulting builds progressive web apps and web applications, as well as native and cross-platform mobile apps, and recommends the one your users need.

Book a 30-minute scoping call and tell us how your users will work.