You've got the idea. You've even made a few sketches on A4 sheets between meetings. There's still the question that's been blocking you for three months: how much will it really cost?
Type the question on Google. You come up with ridiculous ranges: «between €5,000 and €500,000». Thank you very much. You call two agencies. The first tells you €35,000. The second quotes €180,000 for what you describe as the same project. At this point, you're not sure whether you're being made fun of, or whether the question is just badly put.
This article will not give you an exact price. Nobody can. What you will know is exactly what determines the cost of mobile application development, what range corresponds to your project, and what hidden costs nobody shows you in the initial quote.
Why the question is wrong almost every time
Asking «how much does a mobile application cost» is like asking «how much does a house cost». The honest answer comes down to one question: which house, where, what level of finish, with which architect?
The cost of mobile application development depends on five structural variables that serious agencies always examine before putting a price tag on a project. According to annual studies published by Clutch and GoodFirms, two professional platforms that aggregate feedback from thousands of clients worldwide, price differences between service providers for the same specifications can be as much as a factor of 5 to 10.
This difference is not a scam. It reflects the choices made by the service provider in terms of technical stack, team geography, level of finish and business model. Understanding these choices before requesting a quote can save you six months and several tens of thousands of euros.
Mobile application development costs: 5 factors that really make the difference
The first factor is the functional scope. An app with authentication, user profile, integrated payment, push notifications and chat system does not cost the same as an app that simply displays a list of products. Each screen, each function adds man-days of development. A good specification clearly distinguishes the scope of the MVP from what comes later.
The second factor is the choice between native and cross-platform development. Native development (Swift for iOS, Kotlin for Android) involves two separate code bases, so almost twice as much work. Cross-platform frameworks such as Flutter (ported by Google) or React Native (ported by Meta) enable 80 to 95 % of code to be shared between the two platforms, which significantly reduces the cost of mobile application development without always sacrificing quality.
Third factor: the number of platforms targeted. iOS only, Android only, both, plus a responsive web version? Each additional platform increases the ticket by 30 to 80 % depending on the previous technical choice.
Fourth factor: the quality of the design. A €200 template design will produce a decent app. A bespoke UX/UI designed by an experienced designer often represents 15 to 25 % of the total budget, but transforms the user experience and therefore retention.
Fifth factor: the complexity of the backend. An app that displays static content hardly needs a server at all. An app that manages user accounts, transactions, third-party integrations, real-time or sensitive data requires a solid backend infrastructure, often comparable in cost to the application itself.
Actual ranges depending on the type of project
Rather than figures pulled out of a hat, here are ranges that are consistent with what Clutch, GoodFirms and Statista sector reports document on the European market.
A minimalist MVP, an application with 3 to 5 screens, basic functionalities and a light backend, generally costs between €25,000 and €60,000 with a serious European service provider. With a competent freelancer in bootstrap mode, the ticket can go down to between 15,000 and 30,000 euros, at the price of lower speed and more demanding autonomy on your part.
A proper application with authentication, payment, notifications, a polished design and a structured backend automatically costs between €60,000 and €150,000 for version 1.0.
A complex application, such as a marketplace, social network, banking application or app incorporating proprietary AI, starts at €150,000 and regularly rises to €400,000 or €500,000 for the first solid version.
Beyond that, so-called «enterprise» applications developed by large companies for their own use frequently cost in excess of €1 million, but the cost of mobile application development in these cases becomes drowned out by wider digital transformation budgets.
These ranges are European medians observed in professional reports in the sector. Your actual quote will depend on the five factors detailed above, and above all on the partner you choose.
The choice of partner makes all the difference to your budget
There are four options open to you, with radically different consequences for the cost of mobile application development.
Reliable senior freelancers offer TJM between 400 and 700 euros in most major French cities. The cheapest solution on the face of it, but the least secure if your project falls outside its scope or if its availability fluctuates.
The French agency sets its average daily rate at between €600 and €1,100, depending on seniority and standing. You pay for the security of a multi-disciplinary team (dev, design, project manager, QA), stability over time and cultural proximity. This is often the best compromise for an ambitious first project.
The offshore or nearshore agency (Eastern Europe, Maghreb, India) advertises daily rates of between €200 and €450. The arithmetic seems unbeatable. The real difficulties lie in the communication, the time difference, the variable quality depending on the studio, and the management time on your side, which has to be factored into the total cost.
The in-house team, recruited on permanent contracts, becomes relevant when your application is strategic and continues to evolve over several years. For a senior mobile developer in Paris, expect to pay between €70,000 and €100,000 per annum, according to the annual salary surveys published by firms such as Hays and Robert Walters.
The hidden costs that nobody shows in the estimate
The classic pitfall of mobile application development costs is to think only in terms of the initial build phase.
The first expense to be overlooked is the platform fee. 99 dollars a year for the Apple Developer Program, 25 dollars once only for the Google Play Console, plus the Apple or Google commission of 15 to 30 % on in-app transactions if your business model is based on integrated purchases or subscriptions.
Second expense: hosting and backend infrastructure. Depending on the load and the number of users, you can expect to pay anywhere from a few dozen to several thousand euros a month for AWS, Google Cloud or OVH.
The third and most systematically underestimated expense is maintenance. Every year, Apple and Google release major updates to iOS and Android that require you to adapt your application. Industry reports estimate the annual maintenance of an active application at between 15 and 25 % of the initial development cost. An app costing €100,000 therefore represents an annual recurring budget of €15,000 to €25,000 to keep it up and running.
Fourth expense: user acquisition. An app that is not promoted is an invisible app. ASO, Meta Ads, Apple Search Ads, partnerships with creators. Allow for a marketing budget at least equivalent to the development budget in the first year.
The real question to ask before getting a quote
Before asking for a detailed quote on the cost of mobile application development, ask yourself three basic questions that few founders take the time to explore.
Have you validated that your target audience will actually use this application rather than a mobile website? Many projects would be better served by an €8,000 Progressive Web App than an €80,000 native app.
Have you calculated the total cost over three years, including maintenance and acquisition, and not just the initial launch phase?
Are you prepared to iterate seriously after the release, which almost always involves as much budget in the second year as in the first?
A mobile application is not a deliverable. It's a living product. The real cost of developing a mobile application is calculated in years, not months. Founders who accept this from the outset build apps that last. The others end up with a technical shell that is abandoned 18 months after launch, and a cheque for €80,000 to write off mentally.
