How Much Does It Cost to Build an App? Real Price Ranges by Project Type

Between 5,000 € and 100,000 €, app quotes vary by a factor of 20 for projects that look comparable. I've watched founders receive three proposals for the same appointment-booking app: 8,000 €, 35,000 €, and 72,000 €. The problem isn't that vendors lie, it's that nobody is talking about the same scope, or the same production method.

This guide breaks down the cost of building an app by project type (MVP, standard, complex), by technology (native, hybrid, web), and by production model. With, at the end, a clear verdict on the combination that delivers the best value for money in 2026.

Why an app's price varies so much

Asking "how much does an app cost" is like asking "how much does a house cost." The answer depends on three variables: the functional scope, the chosen technology, and the profile of the people building it.

What factors make a quote explode?

The first lever is the number of features. Social login, a Stripe payment system, real-time geolocation, embedded chat: each building block adds between 2,000 € and 15,000 € to the total. According to codeur.com's guide, the cost of a mobile app ranges between 500 € and 25,000 € depending on complexity, but that range excludes high-value-added projects.

The second lever is the platform. Building native (Swift for iOS, Kotlin for Android) means maintaining two separate codebases. Cross-platform (React Native, Flutter) pools 70 to 90% of the code, which cuts the bill by 30 to 50% compared to pure native, according to digitalunicorn.fr.

The third lever is the vendor's profile. A junior freelancer on Fiverr bills 20 to 50 €/hour. A Paris agency bills 120 to 180 €/hour. A senior dev on a staff-augmentation basis sits between the two, with often higher velocity thanks to AI assistance tools. On a recent engagement, I saw a senior equipped with Claude Code deliver in 3 weeks what a team of two juniors took 8 weeks to produce.

Price ranges by project type in 2026

Here are the three main project categories, with the prices observed in France in Q2 2026. These figures are consistent with the data published by Statista on the app development market and with feedback from French agencies on the ground.

How much does a simple MVP cost?

An MVP (Minimum Viable Product) covers between 5 and 10 screens, a functional design, a login, and one or two key features. No frills.

Budget: 5,000 to 15,000 €. Timeline: 1 to 3 months. Typical technology: React Native or Flutter for mobile, Next.js or Supabase for web. According to digitalunicorn.fr, a showcase MVP app with a contact form and push notifications falls within this bracket in cross-platform development.

It's the ideal playground for validating an idea before investing more. My advice: don't spend 40,000 € to confirm that a market exists. Launch an MVP in 6 weeks, measure, then iterate.

What budget for a standard app (e-commerce, booking)?

A standard app includes 10 to 20 screens, a custom design, payment flows, push notifications, and one or two third-party integrations (Google Maps, banking API, CRM).

Budget: 15,000 to 40,000 €. Timeline: 3 to 6 months. This is the bracket where most e-commerce projects, booking apps, and business tools sit. According to aquilapp.fr's guide, annual maintenance adds 15 to 25% of the initial cost, a line item that many project owners forget in their business plan.

At this budget level, the choice of vendor matters as much as the technology choice. A senior dev on staff-augmentation at $210/day often delivers faster than an agency at 600 €/day, because there's no layer of project managers between the code and the decision.

How much to invest for a complex project (marketplace, AI, AR)?

A complex project exceeds 20 screens, embeds artificial intelligence (recommendation, image recognition, chatbot), heavy integrations (ERP, multi-vendor payment systems, real-time), and sometimes augmented reality.

Budget: 40,000 to 100,000 €+. Timeline: 6 to 12 months. The Brazilian agency Agência GENCI confirms complex projects between 100,000 and 600,000 R$ (roughly 18,000 to 110,000 €), with timelines of 6 to 12 months. Adding an AI layer or image recognition represents an extra cost of +30 to 50% on the development line, according to feedback from yeeply.com.

At this stage, the question is no longer "how much does it cost" but "how do we structure the team so we don't blow the budget." I've seen too many 80,000 € projects end up at 150,000 € because the scope slipped with no guardrails.

Mobile app vs web app: what impact on price?

The distinction between native mobile app, web app (SaaS), and Progressive Web App (PWA) radically changes the cost structure.

Should you choose native or hybrid in 2026?

Native (Swift/Kotlin) is still relevant for apps that fully exploit the phone's hardware: camera, sensors, graphics performance. For everything else, cross-platform dominates. Flutter and React Native have reached a maturity that makes native hard to justify in terms of ROI.

According to agence-scroll.com, a custom SaaS web app costs between 30,000 and 80,000 € in 2026, but it avoids the store publishing fees and Apple/Google's 15 to 30% commission on in-app transactions. For a B2B SaaS, it's often the most rational choice.

Vibe coding (Lovable, Bolt, Replit) has driven down the entry cost for prototypes. Steven Cravotta confirms it in his video: these tools let you build a functional front-end for less than 50 €/month. The trap is that a vibe-coded prototype is not a product. As soon as complexity increases, you have to take the codebase back in hand with a qualified developer.

Why does an app cost so much?

It's not the code that costs a lot. It's everything around it.

Invisible costs represent 40 to 60% of a project's total budget: cloud infrastructure (15 to 80 €/month depending on the host), third-party APIs (Google Maps, Stripe, emailing services), corrective and evolutionary maintenance (15 to 25% of the initial cost per year), and multi-device compatibility testing.

The Apple developer account costs $99/year, the Google Play one $25 one time only. These fees are anecdotal, but usage-based APIs can spiral: agence-scroll.com estimates AI credits or third-party APIs between 50 and 500 €/month at small scale.

How an AI-augmented senior dev cuts the bill

The ranges above assume a classic production model: agency, in-house team, or freelancer. There's a fourth model that changes the equation.

How does an augmented developer change the budget picture?

An AI-augmented senior developer, equipped with tools like Claude Code, Cursor, or Copilot, produces code 2 to 4 times faster than a classic dev on repetitive tasks: scaffolding, CRUD, API integrations, unit tests. On a recent e-commerce engagement, I delivered a complete back office (product management, orders, dashboard) in 4 weeks that an agency had quoted at 8 weeks and 38,000 €. The final cost on staff-augmentation: $4,200 (4 weeks × 5 days × $210/day).

That gain doesn't come from magic. It comes from a strict process: specs sliced into testable blocks, project context files (CLAUDE.md, ARCHITECTURE.md) that the AI agent reads before each task, and precise acceptance criteria for every deliverable.

The real advantage isn't using AI, it's building a software production system around AI. A vague prompt produces mediocre code. Structured specs, an agent that tests in the browser and documents its choices, that produces industrial-grade code.

"Companies don't want 'AI,' they want to ship faster for less. A senior dev at $210/day who leverages Claude Code delivers what a team of three bills 500 €/day for."

Vincent Roye, June 2026

That said, the augmented dev isn't the solution to everything. On complex projects with image recognition or augmented reality, AI speeds up the boilerplate but doesn't replace deep expertise. My verdict: below a 50,000 € budget, staff-augmentation with an augmented senior systematically beats the classic agency in value for money. Beyond that, you need to assemble a mixed team.

Which production model to choose: the verdict

The right choice depends on your budget and your ability to steer.

For an MVP under 15,000 €, take a senior dev on staff-augmentation or a seasoned freelancer. No agency: the project-management layer eats your budget. Use AI tools as a velocity lever, not as a replacement for know-how.

For a standard app between 15,000 and 40,000 €, staff-augmentation with an AI-augmented senior dev remains the best ratio. Count on a 3 to 4 month engagement at $210/day, that is $6,300 to $8,400 of pure development, plus 3,000 to 5,000 € of design and infrastructure.

For a complex project above 40,000 €, structure a small team: a senior lead dev who orchestrates the AI agents, a UX designer, and possibly a specialist (machine learning, security). AI-generated code must be governed by a clear architecture, otherwise technical debt piles up faster than with human code.

The cost of building an app in 2026 is no longer an opaque inevitability. The tools have changed, the methods have changed, and a senior who masters both can deliver on staff-augmentation what a traditional agency bills three times more for. The first step is to frame your project by type (MVP, standard, complex) and to honestly cost the functional scope before requesting a single quote.