How Much Does It Cost to Build a Mobile App in 2026?

"How much does an app cost?" is one of the first questions every founder asks, and it’s also the hardest to answer honestly with a single number. Any agency quoting a flat figure before understanding your product is either guessing or padding for risk.

What actually drives cost

Platform count is the first lever: a single cross-platform Flutter or React Native build costs meaningfully less than separate native Android and iOS builds, because most of the code is shared. Screen count and flow complexity come next — a 10-screen booking app with payments and real-time status is a different project than a 10-screen content app with static pages.

Backend complexity is often underestimated. A simple CRUD API behind a content app is inexpensive; a real-time marketplace with matching logic, live tracking, and payment reconciliation is a substantially larger engineering effort, even if the app’s UI looks similarly sized.

Design scope

If you already have brand guidelines and a rough design direction, UI work is faster than starting from a blank page. A full design system — component library, spacing rules, states for every screen — takes longer upfront but pays off once the app has more than a handful of screens.

The honest answer

A tightly scoped MVP with one platform, straightforward CRUD backend and standard integrations is a very different cost than a two-sided marketplace with real-time matching and custom payment flows. The only responsible way to price it is a discovery conversation, which is why we treat that as the free first step rather than a sales formality.