How much does it cost to build a mobile app?

The honest answer is that nobody can price a mobile app from a one-line description, and anyone who does is either padding heavily or planning to renegotiate later. What is genuinely useful is understanding the variables that move the number, because most of them are under your control.

What actually drives the cost

1. The number of distinct screens and flows

Cost tracks the number of things a user can do, not the number of features on a slide. A screen that lists items, a screen that shows one item, and a screen that edits one item are three separate pieces of design, development and testing work. Counting real screens is the fastest way to sanity-check any estimate.

2. Whether you need a back end

An app that only stores data on the device is dramatically cheaper than one with accounts, a server, a database and synchronisation. The moment you need users to log in, share data or see the same content across devices, you are building two products — an app and a service behind it.

3. Real-time and offline behaviour

Live updates, chat, presence and offline-first editing are the features that most reliably surprise people with their cost. They sound like single line items and behave like subsystems, because every one of them forces you to answer hard questions about conflict, ordering and failure.

4. Cross-platform versus native

One cross-platform codebase serving both stores is significantly cheaper than two native builds, and for the large majority of applications the user-visible difference is nil. Native earns its premium for heavy graphics, intensive hardware access or deep platform integration — not for a typical content, commerce or service app.

5. Integrations

Payments, maps, messaging, analytics and any third-party system you must connect to each carry their own development, edge cases and testing. Three integrations is a normal app. Ten integrations is a platform.

The costs people forget

• Developer accounts: Apple charges annually, Google charges once
• Back-end hosting and database costs that scale with usage
• Push notification and email delivery services
• AI or third-party API usage, billed per request
• Ongoing maintenance — OS updates alone force changes every year

How to bring the number down without ruining the product

1. 1Ship one job exceptionally well instead of five adequately — the first release should do the single thing that proves the idea
2. 2Choose cross-platform unless there is a concrete technical reason not to
3. 3Use proven services for authentication, storage and payments rather than building them
4. 4Defer anything real-time until users have asked for it
5. 5Launch on one platform first if your audience is concentrated there

Getting a real number for your idea

A trustworthy estimate requires a defined scope, which is why we treat Discovery and Planning as a paid milestone in its own right. It produces a feature specification, an architecture and a milestone plan with fixed prices per milestone — and it belongs to you regardless of who builds the app.

If you'd like a grounded estimate for your idea rather than a range from an article, book a free consultation and we'll walk through it with you.