How much cheaper is a web app compared to a mobile app?

A web application typically costs £2,000–£10,000 to build. A native mobile app for one platform (iOS or Android) costs £8,000–£25,000. A cross-platform app for both iOS and Android costs £15,000–£50,000+. For the same functionality, a web app costs roughly 40–60% less than a native mobile app.

Do I Need a Mobile App or Just a Website for My Business?

Q: Does my business need a mobile app or a website?

Most businesses need a website first. A website is accessible on any device, requires no installation, and is indexed by Google. A native mobile app makes sense when your users will return daily or weekly and benefit from device features like push notifications, camera access, or offline functionality. If your users interact infrequently or primarily find you through search, a website (or responsive web app) is the right choice.

Q: What is the difference between a web app and a mobile app?

A web app runs in a browser on any device. It can be highly interactive and functional but does not appear in the App Store. A mobile app is installed on a phone and can use device hardware (camera, GPS, push notifications). Web apps are cheaper to build and easier to update. Mobile apps offer a richer experience but cost more and require App Store approval.

Q: Can a website replace a mobile app?

For most business use cases, yes. Progressive Web Apps (PWAs) can be installed on a home screen, work offline, and send push notifications — closing much of the gap with native apps. Many businesses that previously commissioned a mobile app have migrated to a PWA and found it meets 90% of their user needs at a fraction of the cost.

Q: When should a UK business build a native mobile app?

Build a native mobile app when: users will return daily and benefit from a home screen experience; you need hardware access (camera, GPS, biometrics); you need offline-first functionality; or your business model depends on App Store distribution. For most service businesses and e-commerce in the UK, a fast responsive website or web app is more cost-effective and reaches more users.

The honest answer for most businesses is: you need a great website, not a mobile app. A native app costs three to five times more to build, requires App Store submission and approval, needs platform-specific maintenance for iOS and Android, and offers no SEO benefit. For a business whose customers find it via Google or word of mouth and interact infrequently, a fast, well-designed responsive website or web application delivers more value at a fraction of the cost.

That said, there are specific scenarios where a native mobile app is genuinely the right choice. Here is the decision framework.

The Decision Framework

Which Option Fits Your Situation?

Your Situation

Website / Web App

Native Mobile App

Users find you via Google or social

✓ Yes

Not ideal

Users return daily or multiple times per week
Maybe (PWA)
✓ Yes

You need SEO to drive traffic

✓ Yes

Not indexed by Google

App needs camera, GPS, biometrics
Limited
✓ Full access

Budget under £10,000

✓ Yes

Very limited

Needs offline functionality
PWA can work
✓ Best option

Speed to market is critical

✓ Faster

Store approval adds 1–3 weeks

The Three Options Explained

1. A Responsive Website

A website that adapts to any screen size. Works on every device without installation, indexed by Google, and the right starting point for almost every business. Cost: £799–£5,000. Timeline: 1–6 weeks.

2. A Web Application

An interactive, logged-in product experience — customer portals, dashboards, booking tools, SaaS products — that runs in a browser. More complex than a marketing site but still far cheaper than a native mobile app. Can be built as a Progressive Web App (PWA) that installs to a home screen and supports push notifications. Cost: £2,000–£15,000. Timeline: 4–12 weeks.

3. A Native Mobile App

An app submitted to the App Store (iOS) and/or Google Play (Android). Best when daily return visits, hardware access, or offline-first functionality are core requirements. Costs significantly more and requires ongoing separate maintenance for iOS and Android. Cost: £8,000–£50,000+. Timeline: 8–20+ weeks.

The Middle Ground: Progressive Web Apps

Progressive Web Apps (PWAs) are a web application built with modern browser APIs that can:

Be installed to the home screen from the browser (no App Store required)
Work offline with cached content
Send push notifications (on Android; limited on iOS)
Load quickly with service worker caching

For many businesses that feel they need a mobile app, a PWA delivers 80–90% of the user experience at 30–40% of the cost. It is not always the right answer, but it closes much of the gap between a web app and a native app.

Cost and Timeline Comparison

Option	Cost Range	Timeline	SEO?	App Store?
Responsive website	£799–£5,000	1–6 weeks	Yes	No
Web application	£2,000–£15,000	4–12 weeks	Partially	No
Progressive Web App	£3,000–£15,000	5–12 weeks	Yes	Optional
Native app (1 platform)	£8,000–£25,000	8–16 weeks	No	Yes
Native app (iOS + Android)	£15,000–£50,000+	12–20+ weeks	No	Yes

If your primary requirement is acquiring customers through search or converting visitors who land on your site, a website or web app is the right answer. If your requirement is a daily-use product with hardware integration and a home screen icon, a native app or PWA is worth the investment. AskMind's app and website development service covers all of these tiers — with a free Discovery session to confirm which fits your situation before any commitment.

Quick FAQ

Does my business need a mobile app or a website?

Most businesses need a website first. A native mobile app makes sense when users return daily and benefit from device features like push notifications or camera access. If users find you through search or interact infrequently, a website or responsive web app is the right choice.

What is the difference between a web app and a mobile app?

A web app runs in a browser on any device — no installation required. A mobile app is installed via the App Store or Google Play and can access device hardware. Web apps are cheaper and easier to update. Mobile apps offer a richer experience but cost significantly more.

How much cheaper is a web app vs a mobile app?

A web application costs £2,000–£10,000. A native mobile app for one platform costs £8,000–£25,000. Cross-platform for both iOS and Android costs £15,000–£50,000+. For comparable functionality, a web app costs roughly 40–60% less.

Can a website replace a mobile app?

For most business use cases, yes. Progressive Web Apps can be installed on a home screen, work offline, and send push notifications. Many businesses that previously commissioned a mobile app have migrated to a PWA and found it meets 90% of their needs at a fraction of the cost.

When should a UK business build a native mobile app?

Build a native app when: users return daily; you need hardware access (camera, GPS, biometrics); you need offline-first functionality; or your model depends on App Store distribution. For most service businesses and e-commerce, a fast responsive website or web app reaches more users at lower cost.

Not sure which you need? Let's figure it out together.

Free Discovery session. Fixed-price quote after. Websites from £799, web apps from £2,000, mobile apps from £8,000.

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