How much does it cost to build a mobile app in 2026?
The honest answer to “how much does an app cost” is it depends — but it depends on a small number of things you can actually estimate. This guide breaks down what drives the cost of a mobile app, gives realistic ranges for three tiers of project, and shows where budgets quietly balloon.
The short version
A simple, single-platform app with a handful of screens and no custom backend can start in the low five figures. A production app for iOS and Android with accounts, payments, a backend and third-party integrations is usually a mid-five-figure to six-figure project. A complex product — real-time features, heavy data, AI, regulatory requirements — goes up from there. The rest of this article is about working out which of those you actually need.
At Alphatech every project gets a fixed-scope, fixed-price proposal before any work starts, so “it depends” becomes a number you can plan around. See mobile app development.
What actually drives the cost
Scope — the number of things the app does
Cost tracks features, and more precisely screens and states. A login screen is cheap. A login screen with social sign-in, magic links, MFA, password reset, account recovery and an admin view is six screens and a lot of edge cases. Before you get a quote, write down every screen and every “what happens if…”. That list is 80% of the estimate.
Platforms — iOS, Android, or both
Building the same app natively twice (Swift and Kotlin) is close to twice the client-side build cost. Cross-platform frameworks — Flutter and React Native — share one codebase across both stores and typically cut that portion by 30–40%. Native still wins when the app leans heavily on device hardware, animation or raw performance; for most apps, cross-platform is the smarter spend.
The backend nobody budgets for
If your app stores anything, syncs anything, or has user accounts, it needs a server, a database, an API and hosting. That's often 30–50% of the total and it's the line item first-time founders forget. Payments (Stripe, in-app purchase), push notifications, analytics and each third-party integration add real work — every integration is someone else's API to learn, handle errors for, and keep working.
Design
Wireframes and a clickable prototype up front are the cheapest insurance you can buy — they turn “that's not what I meant” into a conversation before it's code. A polished bespoke UI costs more than adapting a design system; both are fine, but decide which you're paying for.
Who's building it
Rates vary enormously by region and seniority. A senior developer who scopes well and writes maintainable code costs more per hour and usually less per project than a cheap team that needs three attempts. The cheapest quote is rarely the cheapest project.
Realistic ranges
These are rough industry ranges for 2026, not quotes — your proposal will be specific to your scope.
- Simple / MVP — one platform or cross-platform, ~5–10 screens, minimal backend, standard UI. Low five figures. Timeline roughly 3–6 weeks.
- Standard production app — iOS and Android, accounts, payments, a real backend, a few integrations, custom design. Mid-five figures to low six figures. Timeline roughly 2–4 months.
- Complex product — real-time or offline-first, large data model, AI features, compliance (health, finance), multiple user roles. Six figures and up. Timeline 4+ months.
The costs that come after launch
- Maintenance — OS updates, library security patches, bug fixes and small changes. Budget 15–25% of the build cost per year, or a monthly retainer.
- Infrastructure — servers, database, file storage, email/SMS, monitoring. Small at first; scales with usage.
- Store fees — Apple and Google take 15–30% of in-app revenue; developer accounts are $99/year (Apple) and $25 one-off (Google).
How to keep the number down
- Cut scope to a real MVP. Ship the one thing users need, learn, then add. Every feature you defer is money you don't spend guessing.
- Go cross-platform unless you have a specific reason not to.
- Reuse a design system instead of commissioning bespoke UI for v1.
- Pick integrations deliberately — each one is ongoing cost, not a free checkbox.
- Get a fixed-scope quote so overruns are the vendor's problem, not yours.
Red flags in a quote
- No backend line item for an app that clearly needs one.
- A single number with no breakdown by feature or phase.
- “We'll figure out the design as we go.”
- A price far below everyone else — it usually means a rushed approach or scope that will be renegotiated later.
FAQs
Is it cheaper to build for one platform first?+
Yes — a single-platform or cross-platform MVP is the cheapest way to validate an idea. Just make sure the code and backend are built so the second platform is an addition, not a rebuild.
Why is the backend so expensive?+
Because it's effectively a second application. The API, database, authentication, payments and integrations are as much engineering as the screens users see — often more.
How much should I keep for maintenance?+
Plan for 15–25% of the build cost per year, or a fixed monthly retainer. Apps that aren't maintained break as the operating systems move under them.
Can AI features be added cheaply?+
Simple ones (a chat assistant, semantic search) are a moderate add. The cost is less the model and more the plumbing — data pipelines, guardrails, evaluation and controlling API spend.
Working on something like this?
We help teams with mobile app development — fixed-scope proposal before any work starts.