How much does it cost to develop an app? From €15,000 to €300,000 (and why)

You search "how much does it cost to develop an app" and Google gives you a range from €10,000 to €500,000. Very useful. It's like asking how much a car costs and being told "between a Dacia and a Porsche."

The range is real, but without context it's useless. What you need isn't a number: it's understanding what factors determine it, where most of the money goes, and what decisions you can make to ensure the budget makes sense.

Let's really break it down.

The factors that move the price

Not all apps cost the same, for the same reason that not all houses cost the same. The price depends on specific decisions, and the sooner you make them, the more accurate your budget will be.

Functional complexity

It's the most important factor. An app with just a login, a list, and a contact form is nothing like an app with integrated payments, geolocation, real-time chat, push notifications, and an admin panel.

To give you a general idea:

Simple app (catalog, information, basic forms): between €15,000 and €40,000. Development takes 2-3 months. It's the equivalent of a functional apartment.

Medium-complexity app (authentication, payments, third-party integrations, management panel): between €40,000 and €120,000. Development time: 4-8 months. It's a single-family home.

Complex app (real-time, AI, multiple roles, elaborate business logic, high scalability): between €120,000 and €300,000+. Development time: 8-14 months. It's a building.

These ranges are indicative and assume a professional team in Western Europe. They vary depending on the market, the supplier, and technical decisions.

Platform: iOS, Android or both

Here is a decision that directly affects the budget.

Native development (Swift for iOS, Kotlin for Android) involves two teams, two codebases, and virtually double the development and maintenance costs. It makes sense when you need extreme performance or deep access to the device's hardware.

Cross-platform development (Flutter, React Native) allows for a single codebase for both platforms. The actual savings are between 30% and 40% compared to dual native development, according to Surf data. Most enterprise and product apps don't require native development. Flutter, for example, covers 95% of use cases with native or near-native performance.

The platform decision isn't technical; it's business-related. Are your users on iOS, Android, or both? Do you need features that only native apps can provide? If the answer to the second question is no, a cross-platform approach saves you money without sacrificing quality.

UX/UI Design

Design isn't about "making it look pretty." It's about deciding what the user sees, in what order, through which interactions, and why. Good UX/UI design reduces friction, improves retention, and lowers support costs.

Design typically accounts for 15% to 25% of the total budget. This includes user research, wireframes, prototyping, visual design, and usability testing.

Skipping this step to save money is one of the most costly decisions you can make in the long run. A technically perfect app with a confusing design is never used.

Backend and infrastructure

The part that the user doesn't see but that supports everything else. This includes servers, databases, APIs, authentication, file storage, email sending, notifications, and all the business logic that runs behind the scenes.

The backend can represent between 30% and 40% of the total cost, depending on its complexity. An app that only consumes data from an external API will have a lightweight backend. An app with its own business logic, multiple integrations, and data processing needs a robust infrastructure.

The choice of technical stack also plays a role. Frameworks like Django allow you to build robust backends with less code and in less time, which translates into fewer hours and lower costs.

What they don't tell you in the budget (and it should be)

The cost of developing an app doesn't end when the app is published. There are costs that many budgets omit or minimize, and these often turn out to be unpleasant surprises.

Maintenance. A production app needs security updates, bug fixes, compatibility with new iOS/Android versions, and performance optimization. According to industry estimates compiled by Clutch , the annual maintenance cost is typically 15-20% of the initial development cost. If your app cost €80,000, budget €12,000-€16,000 annually for maintenance.

Cloud infrastructure. Servers, databases, CDN, storage. In the first few months with few users, the cost is low (€50-€200/month). But if the app scales, the infrastructure cost scales with it. It's not a fixed expense: it's variable and should be planned for.

Publishing to app stores. An Apple developer account costs $99 per year. A Google account is a one-time payment of $25. These are smaller amounts, but they need to be added together. Furthermore, Apple's review process can involve time-consuming adjustments and resubmissions.

Post-launch iteration. The first version of your app won't be the final version. Users will give you feedback, you'll discover features that are unnecessary and others that are missing, and metrics will show you where the experience falls short. Allocate budget for at least 2-3 months of iteration after launch.

Why does the cost of developing an app always go up?

If there's one recurring pattern in app projects, it's this: the initial budget falls short. Not by 10%, but by 50% or more. And not because the vendor deliberately underestimates. There are structural reasons.

Poorly defined requirements. "I want an app like Uber but for my industry" isn't a requirement. It's an idea. The vaguer the requirements, the greater the margin of error in the budget. A reputable provider will ask for weeks of discovery before giving you a quote.

Scope changes. The project starts with 20 features. In month two, someone requests three more. In month four, the main workflow is redesigned. Each change adds hours. It's nobody's fault: building a product is a process of discovery. But if the contract is for a fixed price with no room for changes, surprises are guaranteed.

Third-party integrations. Connecting with third-party payment gateways, CRMs, ERPs, or APIs is often more complex than it seems. Documentation is incomplete, test environments don't function the same as production environments, and technical support responses take days. Each integration can add between 10% and 30% to your original estimate.

Not having testing and QA in place. Developing a feature is one thing. Testing that it works on all devices, with all possible workflows, and under real-world load is another. If the budget doesn't include testing, your users will do the testing. And they're not going to like it.

What to ask before requesting a quote

Before speaking with suppliers, ask yourself these questions. You don't need perfect answers, but you do need honest ones.

What problem does the app solve? Not what features it has: what problem does it solve for the user? If you can't answer that in one sentence, the app isn't ready for pricing yet.

Who will use it? Not "everyone." A specific profile. Age, usage context, usual device, expected frequency of use. This influences design and platform decisions.

What should the first version do? Not your dream version: the first version. The one that validates whether the idea works. If you build a focused MVP, you can launch in 3-4 months with a controlled budget. If you try to launch the complete product right away, be prepared for 12 months and a much higher cost.

What integrations do you need? Payment gateway, CRM, ERP, email marketing, analytics, maps. Each integration is a piece of the puzzle and comes at a cost. List the essential ones and put the "nice to have" ones aside for version two.

Do you have data or content to migrate? If the app replaces an existing system, migrating data is a project in itself. Don't figure it out in month five.

How to read a budget without getting ripped off

Not all budgets are created equal. A fixed figure of 50,000 euros means nothing if you don't know what it includes. Here's what should be broken down.

Project phases: Discovery, design, frontend development, backend development, testing, deployment, post-launch support. If any are missing, ask why.

Estimated hours per phase. A minute-by-minute breakdown isn't necessary, but a distribution that allows you to understand where the effort is concentrated is. If 80% of the hours are spent on development and testing only 2%, there's a problem.

What's not in the budget? Just as important as what's included. Is maintenance included? Store listings? Post-launch iterations? Who pays for the infrastructure?

Billing model. Fixed price, time & materials, or hybrid. Each has advantages and risks. Fixed price offers certainty but little flexibility. Time & materials offers flexibility but requires monitoring. The hybrid model (fixed price per phase with room for adjustments) usually works well for product projects.

Price is the last thing you should care about.

It sounds contradictory in an article about how much it costs to develop an app. But the reality is that the price is a consequence of previous decisions: what you build, for whom, with what scope, and with what team.

A €30,000 app that solves the right problem and launches in three months is worth more than a €150,000 app that tries to do too much and takes a year. Cost isn't what you pay: it's what you get in return.

Before comparing quotes, make sure you're comparing the same thing. And before choosing the cheapest option, ask yourself what you're leaving out. Because in app development, what you don't pay for now, you'll pay for later. Almost always with interest.