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App development

Have your app built — experience from 200+ projects.

Apps create a direct line to your customers, new business models and valuable insights. We build them for iOS, Android and web — backend, cloud and, if you want, AI from one team. Simple apps from €15,000, with a binding fixed price after the Discovery.

Request a project What does an app cost?

Start simply. With a Discovery for €1,900 we clarify scope and feasibility, and you get a fixed-price quote, credited when you place the order. How it works ↓

  • 15 years

    of software development

  • 200+ projects

    from team apps to patient records

  • €1,900

    Discovery with a fixed-price quote, credited

  • 1 working day

    maximum response time to inquiries

Standard

What app development with appDev means.

Tailored

Applications that fit your goals and your audience — functional, usable and individually matched to your brand.

Focused on user experience

Clear interfaces, logical navigation, tested for intuitive use and accessibility. Performance that feels good.

Technical depth

Current technologies, cleanly applied. Security and data protection (GDPR) are part of the architecture from the start.

Future-proof

Modular, scalable architecture that can be extended, including updates and maintenance beyond launch.

Platforms

What we build for.

iOS

Native iOS apps with Swift — fast, maintainable and App Store compliant.

Learn more

Android

Native Android apps with Kotlin, including demanding device fleets.

Learn more

Web, backend & cloud

Web applications, APIs and backends, cleanly integrated into your system landscape.

Learn more

Process

From the idea to the store: how it works.

  1. 01

    Initial conversation (free)

    You describe your project, we tell you what is realistic — a reply the same working day, a conversation within a few days.

  2. 02

    Discovery (€1,900, credited)

    We capture requirements, clarify feasibility and architecture. The result: a written concept and a binding fixed-price quote. Then you decide — even against us; the concept is yours.

  3. 03

    Design and development (fixed price)

    Delivery in two-week stages with visible interim results. Simple apps are done in 8 to 12 weeks, mid-complexity apps in 3 to 5 months.

  4. 04

    Testing and store release

    Quality assurance on real devices; we handle submission and app review for the App Store and Google Play.

  5. 05

    Hand-over and operations

    The complete, documented source code goes to you. On request we take on maintenance, OS updates and further development — you stay independent.

  6. 06

    Done

    Your app is live in the store and available to your users.

Pricing

What an app costs.

Simple apps

€15,000 to €50,000

Example: A capture app for a team — one clear purpose (e.g. receipts, delivery notes, documentation), one platform, few interfaces.

Keeps the price low: tight scope, one platform.

Mid-complexity apps with a backend

€50,000 to €100,000

Example: A field-service app with offline mode — working without a connection, syncing once online, a backend with user management.

Drives the price up: offline data storage and conflict resolution on sync.

Complex applications

from €100,000

Example: A customer app with accounts and system integration — login and personal data, integration with existing systems, usually iOS and Android.

Drives the price up: security, interfaces, two platforms.

The cost estimator narrows down where your project lands — in about two minutes.

Why there is no fixed price here — and how you still get one.

Any serious number before the first conversation is a range. What we can promise firmly is the path to one: after the Discovery for €1,900 you receive a binding fixed-price quote, and the amount is credited when you place the order.

To the cost estimator Request a Discovery

What you get

Experience that holds up.

A well-established senior team

A permanently employed team with cross-industry experience drives your project forward.

Experience in demanding industries

Software we helped build runs in healthcare, at banks, in industry and in public administration. You can see the full range in our projects.

See the projects

Support before, during and after

From the idea through delivery to maintenance, OS updates and App Store management.

AI bridge

AI belongs in your app.

See an example: on-device AI in a shipped iOS app

AI delivers its value where your users already work — right inside the app. That ranges from intelligent search and an assistant through automatic classification to reading out documents and photos. Where data is sensitive, processing runs on-device via on-device ML — the data stays with the user.

Three examples: an insurance app that automatically recognizes and files uploaded receipts. A maintenance app that instantly shows the technician the right manual via search. A health app that evaluates entries on the device, without any data leaving the phone.

The advantage with appDev: the native app and the AI come from one team. The AI comes from a single source, the architecture stays clean and maintainable.

Prove the AI feature first, then build it in. Whether receipt recognition or search really works for your app is something we validate up front as a fixed-price pilot with measurable acceptance criteria. Only then does it become part of the app. To the fixed-price pilot

Reference

From our projects

Health and telematics large

Electronic patient record for a large statutory health insurer

Native Android app in the German telematics infrastructure

A new interface on an existing white-label base, FHIR data models, sign-in via the sectoral identity provider, consent management, connection of further specialist services such as e-prescription and emergency data. Complete traceability and documentation designed for the Gematik audit.

Passed the Gematik audit and in regular operation.

View project
Industry medium

Field-service app with offline operation

Native Android app for work in the field

Local data storage with later synchronization, photo and capture features, distribution via enterprise channels.

In use by the field service; data capture works offline too.

View project
Retail and logistics medium to large

Shopping app for iOS and Android

Native apps for both platforms with payment

Native apps for iOS and Android, connected to the shop backend, payment via established SDKs, personalized content and push.

Two native apps in the store, running continuously with payment and personalization.

View project

All references Get in touch

FAQ

Common questions about app development

What does it cost to have an app built?

It depends on scope, platforms and integrations. Simple apps run €15,000 to €50,000, mid-complexity apps with a backend €50,000 to €100,000, complex applications above that. You'll find the full breakdown with a cost estimator under App development costs.

How long does it take to have an app built?

Simple apps are done in 8 to 12 weeks, mid-complexity apps in 3 to 5 months; complex applications take longer. You get the binding schedule with the fixed-price quote after the Discovery.

Do you build native or cross-platform?

Both are possible. For data-sensitive or performance-critical apps we often recommend native development (Swift, Kotlin); modern frameworks like Kotlin Multiplatform combine native performance with cost efficiency.

Who owns the source code in the end?

For apps developed individually for you: you do. The hand-over is documented, on request with onboarding for your team — any other development team can continue working with it.

Can you take over an existing app?

Yes. We take on individual modules or entire applications, including existing code.

What happens after launch?

On request we take on maintenance, security and OS updates, App Store management and further development. Without a maintenance contract, we hand over in a way that lets any other team continue.

How do you ensure data protection and GDPR compliance?

Processing and hosting in the EU, data minimization and permission control from the first draft. Software we helped build runs in environments with Gematik audits and banking requirements.

Isn't an app builder enough?

For a prototype or a simple content app, a no-code builder (from around €50/month) can be enough. As soon as your own processes, integrations or offline operation come into play, builders hit their limits — and the code there is never yours. In the first conversation we'll tell you openly if a builder is enough for your case.

Do you use near- or offshore developers?

Your project is built by our permanently employed, English-speaking team in Germany. For extra team capacity we offer a European nearshore network on request, all English-speaking — see Find app developers. We do not offer offshore.

Knowledge

Go deeper: app development.

The complete guide

Routes, costs from €15,000, process and choosing a provider — at a glance.

Read the article

Process, timeline and team

The five phases from requirements to launch, with realistic durations.

Read the article

What to look out for: the checklist

12 points to check before commissioning an app agency.

Read the article

Build it yourself or hire?

No-code builder, AI tools, freelancer or agency — when each makes sense.

Read the article

Clean hand-over included

The complete source code is yours — documented and handed over.

Permanent senior team

Your project is built by a well-established, English-speaking team in Germany.

EU hosting

Processing and storage within the EU.

More on GDPR and EU hosting

Get in touch

Tell us about your app. A reply the same working day.

New build or take-over — we'll tell you how we can help. The first conversation is free.

Luca Antonacci

Luca Antonacci

Managing Director

Indir Bektić

Indir Bektić

Managing Director

Pick an open slot in the calendar directly. Free and without obligation.

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