How much does it cost to build a mobile app? Stages and timeline

What drives the cost of a mobile app: types, stages, timeline and rough price ranges. A practical guide for companies in Warsaw and across Poland.

A mobile app is today one of the most effective ways to stay in constant touch with your customer: an icon on the phone screen, push notifications, convenient purchases and service in seconds. No wonder more and more companies in Warsaw and across Poland are considering their own app. The problem is that the question “how much does it cost?” has no single-number answer — the price depends on a dozen factors, and the differences can be tenfold. This guide covers the topic from the ground up: how app types differ, what builds the budget, how the process runs, how long development takes, how much to plan for launch and for maintenance, how store publishing works, what to watch for regarding security and GDPR, and how not to overpay when choosing a developer. By the end you will be able to estimate the order of magnitude yourself and talk to a software house with confidence.

What a mobile app is and when it truly pays off

A mobile app is a program installed on a smartphone (Android or iOS) that runs faster and more conveniently than a website in a browser, while having access to device features: camera, GPS, push notifications, payments, sensors and offline mode. These capabilities are exactly what set it apart from an ordinary website and let an app genuinely boost sales and loyalty.

Before you invest, answer a simple question: does the app solve a specific problem a website cannot? An app pays off especially when the customer returns regularly (food ordering, a loyalty program, bookings, subscription services), when you need push notifications to re-engage users, when speed and offline work matter, or when a digital product is the core of the business. If your goal is mainly to present your offer and capture a contact, it is often cheaper to start with a polished website or web app and add a native app at the next stage.

This decision directly affects cost: the clearer the goal and audience, the more accurate the feature set, and the lower the risk of overpaying for things users will not use.

App types: native, hybrid and PWA — the differences that set the price

The choice of technology is the first and most important cost driver. The same functionality can cost very differently depending on the approach.

A native app is built separately for Android (Kotlin/Java) and iOS (Swift). It offers top performance, smoothness and full, instant access to device features — chosen by products where a refined interface and load matter (games, complex social apps, large platforms). The one, significant drawback: it is effectively two separate projects, so cost and time are the highest.

A hybrid (cross-platform) app is one shared codebase for both systems, most often in React Native or Flutter. Modern frameworks are mature enough that for the vast majority of business apps the performance difference is unnoticeable to the user, while the saving is real — one team, one codebase, one base to grow. Today it is the default, most cost-effective choice for companies that want to be on Android and iOS without doubling the budget.

A PWA (Progressive Web App) is a web app that runs in the browser but behaves like an app: it can be “installed” to the home screen without a store, supports some notifications and basic offline mode. It is the cheapest, fastest way to start and an excellent solution for catalogues, client panels and simple tools. Limitations: weaker access to some phone features (especially on iOS) and no App Store presence, which can matter for image.

In practice, choosing the technology is a trade-off between budget, required performance and where the app must be available. A good developer does not impose one path — first they ask about the goal, then recommend the technology that delivers the best result for your budget.

What exactly affects the cost of an app

A quote is not “the price of an app” but the sum of hours worked by an analyst, designer, developers and testers, multiplied by scope. Here are the elements that build the budget — from the most to the least costly.

Number of platforms. One platform is cheaper than two. With a hybrid approach the difference is smaller (shared code); with native it nearly doubles part of the work.

Scope and feature complexity. This is usually the biggest item. A simple content screen costs a fraction of a payment module, a live chat or offline synchronisation. Every feature is a project, code, tests and maintenance.

UX/UI design. A ready template and standard components are cheaper; a custom, unique interface with animations requires a designer’s work and raises the price — but it is often what decides whether a user stays.

Backend and integrations. If the app stores data, has user accounts, an admin panel or connects to external systems (payments, CRM, inventory, couriers, partner APIs), it needs a server, a database and server-side logic. Every integration is additional scope.

Admin panel. Most apps need a “back office” to manage content, users and orders. This is a separate web app that also has to be designed and built.

Non-functional requirements. Security, performance under heavy load, accessibility, multilingual support, GDPR compliance — the higher the requirements, the more work.

Testing and quality. The app must work on dozens of phone models and system versions. Thorough testing is a cost that pays for itself by avoiding expensive post-launch bugs.

How a quote is built: hours, roles and cost structure

It helps to understand where the figure in an offer comes from. An app quote is, simplified, the number of hours worked multiplied by the rates of the team’s specialists. So two factors decide the price: how much work the scope requires and who does it.

A typical project team is: a project manager (planning and communication), an analyst (requirements), a UX/UI designer, developers (mobile and backend) and a tester. A good app cannot be built well “by one person” — each stage needs a different specialisation, and a missing role usually shows in the quality of the result.

In the budget the proportions are usually similar: the largest part, around 55–65%, goes to programming and testing, around 15% to UX/UI design, another 15% or so to project management, and about 10% to analysis and specification. This shows that “coding itself” is only part of the cost — the rest is the work that makes the app actually run and be usable.

Thinking in hours helps too. Roughly: a simple app is on the order of a few hundred team hours, a medium one from several hundred to over a thousand, and a large product several thousand hours. This is the simplest explanation of why the price gap between projects can be tenfold.

Rates are also affected by the team’s location: developers in Western Europe and the US are the most expensive, teams in Poland offer a favourable price-to-quality ratio, and the cheapest offshore offers often create hidden costs of communication and rework. The “per hour” price is not everything — what matters is how many hours are really needed and how good the result is.

App features and their real impact on the budget

The best way to control cost is to choose features deliberately. Below are the most commonly ordered modules and their impact on scope:

• Registration and login — by e-mail, phone (SMS) or via Google/Apple/Facebook. Social login is convenient and moderately costly.
• Profiles and user accounts — require a backend and a database; the basis of most apps.
• Payments — integration with gateways (Przelewy24, PayU, BLIK, Stripe) or in-app purchases (App Store/Google Play). They require security and testing, so they raise the budget.
• Push notifications — one of the key retention tools; relatively cheap and very effective.
• Geolocation and maps — navigation, “nearby” search, delivery tracking; cost depends on complexity.
• Chat and communication — live chat, messages between users; require a real-time backend.
• Offline mode and synchronisation — working without internet and syncing data later; convenient but technically demanding.
• Admin panel — managing content, products and users; a separate but essential module.
• Analytics — measuring user behaviour (Firebase, GA4) so you can grow the app based on data.

Practical tip: start with an MVP — a version with the most important features that solves the user’s main problem. You launch faster and cheaper, gather real feedback, and add further features when you know they are needed. It is the most reliable way not to “burn” the budget at the start.

Stages of building an app — what happens at each one

A clear process guarantees the budget will not run away and the result will match expectations. In practice we go through six stages:

1. Analysis and scope. We define the business goal, audience, feature list and priorities. A specification and a preliminary quote emerge. This is the most important stage — a well-defined scope saves the most money.
2. UX/UI design. First wireframes (how screens are laid out and how the user moves), then graphics matching your brand. You approve the look before costly programming starts.
3. Development. Developers build the app and the backend, usually in short sprints after which you see working parts and steer the direction as you go.
4. Testing. We check across devices and system versions, fix bugs and take care of performance and security.
5. Publishing. We prepare graphics and descriptions, submit the app to Google Play and the App Store and pass the store review.
6. Support and growth. After launch the app lives on: updates for new OS versions, fixes and new features based on data and feedback.

Remember that the analysis and design stages, though not yet “coding”, decide the success of the whole. Skipping them is the most common cause of overrun budgets and apps nobody uses.

How long development takes

The timeline depends on scope, but the ranges are real. A simple app (PWA or hybrid with basic features) is usually ready in 4–8 weeks. A medium app, with user accounts, payments and an admin panel, most often takes 2–4 months. A large product with many integrations, offline mode and complex logic — six months and up. The real timeline is also affected by how quickly the client decides: fast approval of wireframes and content can shorten the project by weeks. We work in sprints, meet agreed deadlines and set the schedule before the start.

Rough price ranges — what to expect at different budgets

On the Polish market the price depends on complexity. The ranges below are indicative — the exact figure always follows from the specific scope.

Starter budget (a dozen or two thousand zloty): a simple hybrid app or PWA, a standard interface, basic features (content, forms, notifications, a simple catalogue). Good for testing an idea and a quick start.

Medium budget (a few dozen thousand zloty): an app with user accounts, payments, integrations, an admin panel and custom UX/UI design. The most common range for real business products.

Extended budget (from several dozen thousand and up): a native app or a complex product with many integrations, offline mode, advanced analytics and high security and performance requirements.

Add fixed costs to the build budget from the start: developer accounts (a one-time Google Play fee, a yearly Apple Developer fee), possible hosting/backend and post-launch support. That way you avoid surprises right after launch.

How much different types of apps cost — industry examples

Complexity, and therefore cost, strongly depends on the type of app. Below are typical categories from simplest to most demanding:

• Informational app / business card — content, contact, a simple catalogue. The lowest cost and the fastest start.
• App with an account and backend — login, user data, content editing. The basic level of a “real” app.
• Loyalty or booking app — accounts, push notifications, integrations; an excellent effect-to-cost ratio for services and venues.
• Mobile store (m-commerce) — catalogue, cart, payments, integrations with inventory and couriers; higher cost due to payments and order logic.
• Delivery or taxi app — real-time geolocation, usually two apps (customer and driver) plus a panel; one of the more expensive types.
• Messenger / chat — real-time messaging and high server requirements; costly to maintain.
• Corporate app — integrations with internal systems, roles, elevated security; cost depends on scale.
• AR/VR, real-time video, artificial intelligence — the most advanced and expensive components, increasingly common today.

So the same “app” can cost a dozen thousand zloty or many times more — it all depends on which category your idea belongs to and how much logic runs “under the hood”.

Publishing to the App Store and Google Play

To reach users, the app must pass the stores. Publishing requires developer accounts: Google Play Console (a one-time registration fee) and the Apple Developer Program (a yearly fee). Beyond the app file itself, the stores require a set of materials: an icon, screenshots, a description, a category, a privacy policy and information about the data processed.

Each store runs a review. Google Play usually accepts apps faster; Apple can be stricter and pays attention to compliance with guidelines (feature completeness, correct payments, privacy). That is why publishing is best handled by an experienced developer — they prepare the materials, configure the accounts correctly and take the app through the process without unnecessary rejections that can delay the launch by weeks.

Maintenance, updates and app growth

An app is a living product, not a one-off purchase. Android and iOS update every year, new phone models appear, store requirements and libraries change. Without updates, bugs will appear over time, and in an extreme case a store may pull the app. So a maintenance budget is worth planning from the start — usually a small percentage of the build cost per year, depending on the scope of support.

But maintenance is not only “fixing”. It is also growth: analysing user behaviour, adding features that genuinely increase sales and engagement, and optimising what works. The best apps are built in stages — you start with an MVP and then grow the product on data, not guesses.

Data security and GDPR compliance

If the app collects user data (accounts, contact details, location, payments), GDPR applies to you (in Poland, RODO). In practice this means: a clear privacy policy, consent to data processing, secure storage and transfer of data (encryption), the minimisation principle (collect only what is needed) and the ability to delete the account and data on request. Stores — especially Apple — now require a declaration of what data the app collects and for what purpose.

Security is also protection against abuse: correct authorisation, payment protection, up-to-date libraries. This is not an “optional” item — neglect here can cost far more than implementing the safeguards. A good developer treats security and GDPR as a standard, not an add-on.

Mobile app or web app (PWA) — how to choose

This is a common dilemma at the start. Choose a mobile app if you need store presence, push notifications, full access to phone features and the best possible experience for a user who returns regularly. Go for a web app (PWA) or a web application if the budget is limited, you need a quick start and the key point is for the solution to work on any device without downloading from a store.

Often the most sensible path is staged: you start with a web app or one mobile platform, test the product on the market and only then invest in a full native version. That way the risk is lower and every next zloty is spent on what actually works.

How to reduce the cost of an app without losing quality

The budget can be deliberately limited without sacrificing quality. Proven ways:

• Start with an MVP. First build a version with the key features, launch it and grow it on real feedback — instead of building everything at once.
• Reduce the number of screens. More capability on fewer well-designed screens means less work and easier use.
• Consider hybrid technology if you do not need top performance — one codebase for both systems instead of two separate projects.
• Stick to Apple and Google guidelines. Standard, ready components are tested and cheaper than custom solutions from scratch.
• Break the project into stages and avoid “by yesterday” work — haste almost always raises the cost.
• Aim for quality from the start. An app done well the first time is cheaper than a cheap one you have to rebuild.

A deliberate approach to scope can cut the budget by tens of percent — without degrading quality for the end user.

Common mistakes when ordering an app

• Too broad a scope at the start. Trying to build everything at once is the fastest way to overrun the budget. Better an MVP and staged growth.
• No analysis before coding. Skipping the analysis and design stage ends in rework that costs more than doing it well the first time.
• Choosing by lowest price only. A very cheap offer often means no testing, security or support — the costs come back later with interest.
• No rights to the code. Make sure you receive the code and rights when the project ends — otherwise you become dependent on a single developer.
• Skipping the maintenance budget. An app without updates quickly loses quality. Plan support from the start.

How to choose an app developer in Warsaw

When choosing a software house, look at several things. First — the portfolio and real deployments, ideally similar to yours. Second — a clear, transparent process: analysis, quote, schedule, sprints, tests. Third — handing over the code rights and full ownership of the product on your side. Fourth — communication and support after launch, not disappearing once the payment is received.

Our office is in Warsaw, we work with clients across Poland and we start with consulting: we help choose the technology and scope so that your budget delivers a real business goal. We hand the rights and code to the client, and after launch we provide support and growth. Before we start anything, we prepare an individual, free quote based on your specific needs.

Company or freelancer? For single, small tasks a freelancer can be enough. But for a complete app a software house has the edge: continuity of work (one specialist’s absence does not stop the project), legal responsibility and a contract, a tested team of different specialisations, post-launch support and saving your time on coordination. A very cheap one-person offer often ends in rework and surcharges.

Frequently asked questions

Can I start with one platform? Yes. We often start with Android or iOS (or with one shared codebase in a hybrid technology) and add the second platform later. This spreads the cost over time.

Will I own the app? Yes — we hand the code and rights to the client. You own the product.

How much does app maintenance cost? Usually a small percentage of the build cost per year; it depends on the scope of support and the number of integrations that need to be kept up to date.

How does a hybrid app differ from a native one in practice? For the user, most often in nothing — both run smoothly. The difference is in cost and time: hybrid is one codebase for both systems, native is two separate projects with top performance.

Do I need a backend? If the app has accounts, payments, an admin panel or stores data — yes. Simple presentation apps can do without an extensive backend.

How fast will I know the exact price? We prepare a rough quote after a short talk about your idea, and an exact one after agreeing the scope and features.

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