Wir bauen Apps.
Auch deine. We build apps.
Yours too.

We design and build iOS and Android apps for founders and companies, from the first idea to the store. Nine apps we run ourselves show how we work.

Start a project See our apps

Warum eine eigene App?
Weil deine Kunden dort sind. Why your own app?
Because your customers are there.

An app sits on the home screen, reaches people by push and sells in a few taps. Current industry studies show it in numbers.

3.5 hrs
is the average time a smartphone user spends in apps every day.
Sensor Tower, 2025 1
4.5×
higher conversion: 18% buy in the shopping app, 4% on the same retailer’s mobile web.
Criteo 2
13%
more purchases come from users who allow push notifications than from users who don’t.
Airship, 2025 3
$150B
was spent on apps and in app purchases in 2024, 13% more than the year before.
Sensor Tower, 2025 1

Push versus newsletter

Share of recipients who respond right away. For push, the app is opened from the notification. For a newsletter, a link is clicked.

  • Push, top 10% of apps 10.7%
  • Push, median app 3.4%
  • Newsletter, all industry average 2.6%

Push: Android, 2024 data. On iOS the values are 8.0% and 3.1%. Sources 3 and 4.

  1. Sensor Tower, State of Mobile 2025
  2. Criteo, Retail and Travel Apps See 4x More Conversions than Mobile Web
  3. Airship, Mobile App Push Notification Benchmarks 2025
  4. Mailchimp, Email Marketing Benchmarks

Deine App.
Von der Idee bis in den Store. Your app.
From idea to the store.

We build apps for founders, companies and teams, held to the same standard as our own. Everything from one team, from the first draft to the release and beyond.

  • Apps for iOS and Android

    One codebase for iPhone, iPad and Android. Faster to the store, cheaper to maintain.

  • Design

    Clickable prototypes and an interface that feels at home on the device.

  • Backend and cloud

    APIs, sign in, databases and hosting, for example on AWS. Secure and scalable.

  • Release and care

    Store listings, screenshots and privacy labels, then updates, monitoring and new features.

How a project runs.

Four steps with clear dates. You always know where your app stands.

  1. First call

    Free and without obligation. We clarify goal, audience and scope. Then you receive a binding quote, as a fixed price or by effort.

  2. Concept and design

    The idea becomes a clickable prototype. You see and try your app before the first line of code is written.

  3. Development

    We build in stages. You install every milestone as a test build on your own iPhone or Android device.

  4. Launch and care

    We prepare the store listings and submit to Apple and Google. After that we stay on board with updates and new features.

Frequently asked questions

Question not listed? Write to us

It depends on the scope. Smaller projects start at around 5,000 €. Apps with a database, sign in and integrations with other systems usually range from 10,000 € to 50,000 €, large solutions can go beyond. After the free initial call you receive a binding quote, as a fixed price or by effort. Larger projects are billed by milestones.

A lean first version usually reaches the store in two to three months. With a backend, accounts, several languages or subscriptions it is more like four to six months. We set the schedule together, with clear dates for every stage.

Yes. In the first call we sharpen the audience, core features and the scope of a first version. A small first version is often the faster and cheaper way into the store. What users really need becomes clear after launch.

Yes, with Flutter from one shared codebase. Your app reaches iPhone, iPad and Android at the same time, and every change is built only once. Our own apps are made the same way.

Once paid in full, you receive a transferable usage right without limits in time or territory to everything we build for you, including the source code. Exclusive rights can be agreed in writing on request. The details are in our terms.

Yes. We create screenshots, descriptions and privacy labels, handle the upload and answer questions from Apple and Google. The app is published under your name in your own developer account.

Yes. Subscriptions and in app purchases, health data and on device storage are already part of our own apps. Push notifications, sign in, maps, camera and integrations with existing systems are just as much part of our work.

Yes. Confidentiality is part of our terms and continues for three years after the project ends. If we process personal data on your behalf, we sign a data processing agreement under GDPR.

We build GDPR compliant, with clear privacy notices, encrypted transfer and no more data than needed. We run backends on AWS in Frankfurt, on servers inside the EU.

We stay on board with updates for new iOS and Android versions, fixes and new features. On request we also take care of hosting, monitoring and the release of every new version.

Tell us about your idea.

Send us an email. We will get back to you right away.

Write an email

or directly to