No one can honestly quote an app development cost without a brief. Still, custom app pricing always comes down to scope, complexity, hourly rate, and a risk buffer. Development itself is just the tip of the iceberg. Over five years, app maintenance costs, operations, and new features can exceed the build price.

Instead of a vague price range, we show how to calculate software total cost of ownership (TCO). We explain price drivers, Czech rates, and hidden expenses, then model five-year costs across three scenarios. At the end, you get eight questions for vendors before signing a contract.

What drives app development cost

Custom app pricing comes from four variables: scope (what it does), complexity (how hard features and integrations are), the team's hourly rate, and a risk buffer. That is why quotes for the "same app" differ widely.

Scope is underestimated most often. Every feature hides questions: Who sees what? Should the app send emails or work offline? Each answer changes the effort.

Complexity hides in integrations (accounting, payments, inventory) and exceptions. Our article on connecting an e-shop to accounting shows how integrations work. Exceptions for specific customers or goods often cost more than the main workflow.

Uncertainty drops with preparation. Until details are clear, a vendor adds a buffer. Starting with a short paid discovery pays off: you get must-have and deferrable features, screen designs, integration specs, and an effort estimate. You can then easily compare quotes across vendors.

Timeline shapes cost too—small projects take weeks, mid-sized ones 8 to 12 weeks. Look for the shortest path to a first usable version.

A solid quote includes:

• Analysis and design: scope, screens, and data model.
• Development: coding and system integrations.
• Testing: manual and automated functional checks.
• Project management: communication, planning, and regular demos.
• Launch and warranty: deployment, data migration, and warranty fixes.

If anything is missing, check who does it and pays for it. We describe the full process in How web and mobile app development works.

Czech hourly rates and what they cover

Public rate data in Czechia is scarce. In an April 2026 Czech survey of communication agencies by the Association of Communication Agencies, hourly rates were CZK 2,042.52 for a developer, CZK 1,266.62 for a coder, and CZK 2,410.33 for a UX designer (AKA, 2026 Hourly Rate Survey Results). Treat these as rough guides: they are non-binding numbers from communication agencies (not software firms) for standard delivery, not strategy.

The lowest rate does not make the cheapest project. An experienced team with ready-made components finishes in 250 hours at CZK 2,000 for CZK 500,000. A cheaper team at CZK 1,500 spends 400 hours for CZK 600,000—and without tests leaves bugs you fix for a year. The figures are illustrative, but the rule holds: compare total price and scope.

When checking rates, ask:

• Are project management and testing included, or billed extra?
• Who actually works on the project and what is their experience?
• Do you pay for hours worked, or a fixed price for scope?
• What do post-launch changes cost per hour, and how fast does the vendor respond?

We explain how risk splits in Fixed price vs. time and material.

The iceberg of operating costs

Spending does not end at launch. Ongoing app maintenance costs and operations—updates, hosting, third-party services, store fees, new features, and staff time—can top the build price over five years.

• Maintenance and updates. Libraries need security patches and mobile apps need updates for new OS versions. Unmaintained software goes stale.
• Hosting and cloud. Servers, databases, and storage. Cost grows with performance, data volume, uptime, and users.
• Third-party licenses and APIs. Payment gateways, maps, emails, SMS, or AI. Billed by usage, they grow with your app's success.
• App store fees. Apple costs USD 99/year (Apple Developer), Google Play USD 25 once (Google Play Console).
• Monitoring and backups. Tracking outages and security, plus verifying backups actually restore.
• Your team's time. Requesting changes, testing, training, and user support.
• Further development. Without new features, an app is outdated within two years.

37signals (makers of Basecamp) show how high operating costs run. In 2023 they left Amazon Web Services for their own servers to save roughly USD 10 million over five years (37signals, Cloud exit). Cloud pays off for a small app, but operations are never minor.

Cover operations with a service-level agreement (SLA). It sets outage response times, prepaid maintenance hours, and extra work rates. You get predictable monthly costs and priority help if the app goes down.

Five-year cost model

This model shows five-year costs based on how you maintain and grow the app. The numbers are illustrative assumptions, not a quote or market average—plug in your own:

1. Development cost CZK 500,000 in all three scenarios.
2. Developer hourly rate is CZK 2,000 (rounded from the Czech AKA survey).
3. Maintenance and updates: 2, 5, and 10 hours/month (lean, standard, and growth scenarios).
4. Further development: 0, 50, and 150 hours/year.
5. Hosting and third-party services: CZK 1,000, CZK 3,000, and CZK 10,000/month.

Over five years, operations make up over a third of total cost in the lean scenario. In standard, operations and growth pass double the build cost, and in growth over six times—though that means the app succeeded.

Three practical takeaways:

• When comparing quotes, ask about operating costs and hourly change rates.
• Plan your budget for years ahead, not as a one-off.
• The lean scenario stays cheap only until the app grows outdated or insecure.

The calculation excludes your team's time and, for a mobile app, five years of Apple membership and the one-off Google Play registration.

Off-the-shelf vs. custom: when each pays off

An off-the-shelf system starts cheaper, but licenses grow with headcount. Custom app pricing starts high and grows slower. User count and lifespan set where the curves cross.

Calculate it yourself. For an off-the-shelf tool, multiply the monthly license by users and months (counting company growth) and add setup, add-ons, and tweaks. For custom software, sum build, operations, and growth. Compare totals after one, three, and five years.

Count exit costs too: data migration, parallel runs, and training for off-the-shelf tools, or code handover to another vendor for custom builds. Open data formats and solid documentation cut both.

Custom development pays off sooner when many people use the system (including customers and suppliers), your firm grows fast, or you need costly customizations. For a few people and standard workflows, pick an off-the-shelf tool.

It is not just about money. Custom software sets you apart from competitors, while off-the-shelf tools take routine admin off your hands. Read more in Custom software, off-the-shelf system, or no-code?.

Where to save and where not to

Save on scope and process, not quality. A simple first version, ready-made parts, and one web app instead of two mobile apps save money. Cutting tests, security, and documentation costs more in repairs.

Where saving pays off:

• Standard components. Use ready-made services for login, payments, emails, or maps.
• One web app instead of two native apps. A progressive web app (PWA) runs in a browser, adds to the home screen, and builds once. Native iOS and Android apps fit only deep phone integration or app stores.
• A clear brief. Vagueness costs twice: in questions and in rework.
• Existing visual style. Reuse your company colors, fonts, and logo. An internal tool for five colleagues does not need consumer-app design.

Where not to cut corners:

• Testing. Fixing a bug before launch costs less than after a customer complaint.
• Security. A data leak costs money, trust, and potential GDPR fines.
• Documentation and source code. Without them, you depend on a single vendor.

Eight questions about operating costs

Before signing a contract, ask about post-launch operating costs. A solid vendor answers specifically in writing.

Put the answers in a table and compare five-year costs, not just the build.

For reference:

• web applications: from CZK 230,000
• business systems: from CZK 180,000
• all prices: in our price list
• your estimate: enter your ideas in our project configurator to get a brief with three price options

Frequently asked questions