Specialized mobile apps for iOS and Android

We design and develop an app for the mobile platforms Android and iOS - from smartphones to tablets. Thanks to Facebook's React Native technology, we can develop a cross-platform and remain cost-efficiently up-to-date on the major operating systems. For the app project we accompany you from the initial idea to the publication in the digital stores and beyond that with the continuous further development. We plan together taking into account current trends, established procedures and current market requirements.

From the idea to the App Stores

Analysis & Planning

Step by step, we work with you to develop a plan to define the timeframe, content and financial framework of the app project. We take a look at the mobile market and the space it contains for your ideas.

In workshops and comprehensive consultations you will receive an overview and recommendations based on your ideas.

Concept & Design

Based on market insights and the created plan, we design a strategy for content and user guidance of the app. To ensure that nothing stands in the way of an optimal user experience, we coordinate rough sketches of the app with you in the form of wireframes. With these, we develop an interface with flawless aesthetics. We are then happy to build you a working prototype so that you can test the app before development.

Implementation & Beta tests

After concept and design follows the programming. We implement your wishes in several phases and continuously check the quality of the app. Via Apple's TestFlight and Google's Play Store, we provide alpha and beta versions to you and a group of people defined by you. In this way, the quality of the app is ensured again and again in several steps - All reported bugs are thus eliminated before the release.


At launch, your app will be published in the Google Play Store and iOS App Store, making it available for download on any classic smartphone worldwide.

In order to present your app optimally, we take care of the correct description and the presentation including screenshots and videos.

Quality assurance & maintenance

Of course, we will continue to support your app even after it has been published. We keep the app up to date, adapt the functions and contents together with you again and again. Furthermore, we always keep the app up to date with the latest technology and ensure continuous updates in order to always be compatible with the latest operating systems. Using a feedback system, we analyse user behaviour, the number of installations per operating system, device, country and technical details.

Please contact us

Have we aroused your interest? – Contact us today for a non-binding offer!

Technology – proven and highly up-to-date

We will implement your app with proven and modern technologies. There are different ways to develop an app, of which we would like to make a clear recommendation in the following. But we also want to mention other possibilities.

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Progressive Web App

One option is to develop as a "Progressive Web App". In this case, we develop your app as a website that can be saved on the home screen via the browser. iOS and Android share the program code almost completely.

  • Good performance
  • Same look on all operating systems
  • No installation necessary

  • Features and interaction possibilities differ from those of well-known apps
  • No publication in the App Stores
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React Native

We prefer to use Facebook's open source technology React Native for app development. This enables simultaneous development for iOS and Android ("crossplatform"), whereby a large part of the program code can be used for both operating systems.

  • High performance
  • Release in Apple's App Store and Google's Play Store
  • Allows access to many native features
  • High customization possibilities for app design
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We develop apps separately for Android and iOS. In doing so, we exploit all the possibilities of both operating systems and thus guarantee maximum performance and user experience. This means almost double the effort - in contrast to our recommendation React Native.

  • Publication in the App Stores
  • Maximum performance
  • Use of all possibilities of the terminal device

  • Independent app required for each system
  • Higher development costs than with React Native


CityPower – Whitelabel Apps

CityPower – formerly Emscher Lippe Energie GmbH – supplies private, commercial and business customers in Gelsenkirchen, Bottrop and Gladbeck with electricity, natural gas and heat and also offers a wide range of other energy services. The smartphone apps we developed for the CityPower network enable users to find CityPower Card offers. Regional offers can be filtered, for example, using a radius search. A login function gives registered users access to the administration of the CityPower Card. Another bonus is that users can show their digital CityPower Card directly at event venues via the app, for example to benefit from discounts.



  • Push notifications for news
  • Tracking of user behaviour (can be deactivated by the respective user)
  • Google Maps integration for radius search and nearby offers
  • Connection to a backend system with which the customer can view and edit the offers and user data contained in the app.




Does my company need an app?

There are various reasons for a company to have an app developed: A mobile app can be useful to simplify internal processes or to make training courses for employees easily accessible, for example. For companies with a particularly large number of employees, app solutions can save time in the long term.

Apps are of course particularly interesting in external communication. Mobile applications are popular for customer loyalty by regularly providing customers with vouchers and discount coupons and allowing them to participate in promotions. But they can also provide other information such as locations and information about availability or prices of products. An app may be particularly necessary if competitors also offer an app.

Even though there are many good reasons to use a mobile application in one's own company, it should be carefully considered whether an app is actually the best solution and how it can be strategically integrated with the other products and offerings. After all, the development costs for mobile applications can be very high, so an investment must be well considered.


How much does it cost to develop an app?

The costs for an app cannot be named in a general way. The more functions, i.e. the more complex the development, the higher the costs. The operating systems on which the app is to run and whether the apps are programmed natively for different systems or with a hybrid solution such as React Native are also decisive factors. Depending on the provider, prices for the development of a simple app start at several thousand euros. Complex apps with many functions tend to cost in the five-figure range.

How long does it take to develop an app?

Depending on the complexity and scope of a mobile application, the duration of app development can range from a few weeks to many months. Simple apps can sometimes be released after just one or two months, while larger and more complex projects can take anywhere from a few months to over a year to develop.

Contact us

Do you have an interesting idea for an app? We are looking forward to your inquiry. Contact us without obligation! We will be happy to advise you and show you the possibilities of turning your idea into reality and developing a mobile application.