12+ Years of App Development
Everything from a single source
50+ Successful App Projects

Mobile App Development

Mobile App Development with Custom Service

As specialists in app development, we create your app for cross-platform, iOS, and Android, tailored to your company.

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Complete Support

From concept to app programming, design, and maintenance

Time &
Cost Efficiency

Through cross-platform expertise and modern technologies

Personalized Apps

Custom apps tailored to your target audience

Why Cayas Should Develop Your App

For over twelve years, Cayas has been developing efficient, stable apps for iOS, Android, and cross-platform, with a clear focus on a well-thought-out user experience.

With modern technologies like .NET MAUI, you get a future-proof app with strong performance on all devices.

All-Around Support

From the idea and app design to launch and continuous further development, we reliably and transparently guide your project.

Apps for Many Devices

We are experts in iOS, Android, cross-platform, and web applications tailored to your requirements.

Customized App Development

As an app agency, we plan and develop apps flexibly, modularly, and with the services you truly need.

Convincing Quality

As experienced app developers, we ensure performance, stability, and a sustainable app architecture.

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The Perfect Mobile App

Your App in 4 Simple Steps

  1. Personal Consultation
    Schedule a free, no-obligation initial consultation. Together, we'll clarify the requirements, goals, and potential of your app and develop a custom concept.
  2. Concept and Prototyping
    Through a structured app design and an early prototype, you can quickly see how your app will look and function. In this phase, you can work with your app developer to make targeted optimizations and adjustments, significantly shortening the development time.
  3. App Development Phase
    Our app design creates the foundation for intuitively understandable functions. This is how we ensure excellent performance, high usability, and an optimal display on all devices.
  4. Launch and Further Development
    We'll guide you through the go-live in the App Store and remain at your side for updates, enhancements, and ongoing optimizations.
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Custom App Development

Two Ways of Working Together

At Cayas, you decide how you want your app developed and to what extent we support you as a service provider.

Full-Service from Our App Development Agency

Our team takes on the entire project: we conceptualize, design, and develop your app, and stay on board even after the go-live. As app developers, we ensure that your solution grows, performs, and remains successful in the long term.

Expert as a Service

As a second option, we offer support for your existing team until the go-live. We focus efficiently on the tasks you assign us, without subsequent support. In both models, we work transparently, agilely, and with a high standard of quality.

Whichever path you choose, our app developers will bring your idea to success with energy and a clear structure.

Learn More About Flexible Collaboration
Two software developers designing and developing an app, displayed on a tablet and a large screen.

Custom App Programming

Over time, we have specialized in two central areas of app development: on the one hand, we develop applications for internal process optimization, and on the other, apps for customer loyalty that digitally expand existing products or services.

Our app developers are also the right contacts for other app types and realize custom solutions with foresight, scalability, and high quality.

App Programming

UX and UI App Design as Part of App Development

A professional app design is the key to successful digital products. As a service provider for app development, we combine user-centered user experience (UX) with a modern user interface (UI) to design apps that work intuitively, build trust, and achieve higher conversion rates.

Through clear structures, responsive design, and a consistent brand experience, we create solutions that delight users and build long-term loyalty. This makes app design a success factor for your application—aesthetic, functional, and effective.

Information on App Design
A wireframe of a mobile app, illustrating the UI design process at Cayas Software.
A wireframe of a mobile app, illustrating the UI design process at Cayas Software.

Migration of Existing Apps

A new development is not always necessary. In many cases, migrating existing applications is sufficient, for example, from iOS to Android or vice versa. We modernize apps, update technologies, and, on request, can make them available for multiple operating systems simultaneously via platforms like .NET MAUI.

Functionality and usability are preserved, while reach, future-readiness, and user potential grow significantly.

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Portrait of Aron Spohr, CTO flaschenpost SE
»Cayas Software is an excellent team! I personally enjoyed the energy and professional support that the entire team gave us during the project.«
Aron Spohr CTO flaschenpost SE
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A Cayas expert supports a developer working on complex code, symbolizing the 'Expert as a Service' approach.

App Development Agency

Contact Cayas now!

  • Get personal advice
  • Find the right app technology
  • Receive clear insights and recommendations
  • Successfully implement your app idea

FAQ

Frequently asked questions about app development

.NET MAUI finally replaced Xamarin in 2024. With the cross-platform framework .NET MAUI, the development of native apps for different platforms is made possible in the same programming language and with the same tools.

Another advantage is that a large part of the app logic, such as server communication and business rules, can be reused across platforms. Apps created with .NET MAUI offer almost native performance and are more efficient than hybrid or web apps. Furthermore, .NET MAUI enables access to native APIs and functions, which is particularly advantageous for complex apps.

With .NET MAUI, apps can be developed that can be run on different platforms. It supports the creation of native user interfaces for each platform and offers a uniform user experience. Changes can be made during the runtime of the app, which shortens the development time. .NET MAUI is closely integrated with Visual Studio, which creates an efficient development environment.

The following points underline the efficiency and flexibility that .NET MAUI offers for the development of modern applications:

  • Cross-platform app development
  • Uniform programming language
  • Native user experience
  • Code reuse

We offer smartphone app development and for all other common devices such as tablets or wearables. Since we realize mobile app development for iOS and Android as well as cross-platform apps and web applications, popular mobile devices are supported as well as Mac, Windows PCs or smartwatches. Our app development for iPhone, iPad, Google Pixel, Samsung Galaxy and Co. makes it possible for your app to be used by your customers on every typical mobile device.

Thanks to our technological approach, we can ensure that your application runs stably on all devices.

We offer comprehensive support during the development process, especially in the area of cross-platform app development for Android and iOS. We offer services such as the development of warehouse logistics apps, integration into existing teams to overcome bottlenecks, project management and consulting.

Our services at a glance:

  • App Design: We design interfaces that are attractive and intuitive. We also take into account corresponding design guidelines (e.g. for iOS apps). This creates a clear, user-friendly experience.
  • UI Design: Visually appealing interfaces with a clear structure that reflect your brand and immediately pick up users.
  • App Programming: We implement your app technically in a modern development environment and offer you native app development for iOS or Android.
  • Mobile App Testing: Thorough tests on various devices ensure the quality, performance and stability of your app.
  • Flexible expert support: Whether you hand over a complete project or need selective support – we adapt to your needs.
  • Mobile App Development Trainings: In addition, we offer trainings and support for teams that want to learn app development or expand their skills in app programming.

Cayas Software positions itself as a full-service partner and attaches great importance to high-quality and cost-effective solutions.

Yes, we can convert existing Xamarin apps to .NET MAUI, .NET for Android or .NET for iOS. To do this, we update projects to SDK-style projects and dependencies to the latest .NET version. On our blog page, you can find an article about the 7 steps to migrate from Xamarin Forms to .NET MAUI for further insight.

The development time of an app depends on its scope. Smaller projects can be completed in just three weeks, an app with several functions can take up to six months of development time.

  • Planning (1-2 weeks): Together we sharpen your idea and derive a clear concept from it, including requirements for app design, functions, performance and quality.
  • Design & Prototyping (3-4 weeks): A prototype shows the look & feel of your app at an early stage. This gives you a concrete picture of the later user experience and allows you to make targeted adjustments in this phase.
  • Technical App Development (6-12 weeks): In the development phase, we combine the app design with features and architecture to create a functional application. Your app is created step by step.
  • Quality Assurance (3-6 weeks): To ensure a smooth experience, the app undergoes extensive testing after app programming.
  • Release & Go-Live: Finally, we publish the app in the desired store and accompany the launch.

Cayas Software GmbH has developed a variety of cross-platform apps that cover different industries and use cases. We are experts in app development for iOS and Android. The app types we have developed include:

  • Warehouse logistics apps: These apps optimize warehouse processes and improve efficiency in logistics.
  • Driver apps: Developed for delivery services to enable drivers to navigate safely and efficiently.
  • Voice command integration: Implementation of voice commands in apps to increase user-friendliness.
  • Field service apps: For order management, reporting and mobile process support.
  • Customer portals & service apps: Digital interfaces to customers, orders or support.
  • Maintenance and technician apps: For smart process control directly on site.
  • Marketing and product apps: For strong customer loyalty and brands to experience.

Yes, definitely! At Cayas, we are not satisfied with just publishing the app. We offer ongoing support and maintenance on request. Depending on your requirements, this can include monitoring, updates, bug fixes, performance improvements or even the development of further functions.

Our goal is to ensure that your app runs smoothly and grows with your business. As a rule, we offer flexible support models after publication:

  • Maintenance contracts with a defined scope and fixed service levels.
  • Flexible support packages with a fixed number of hours per month that you can use as needed.
  • On-demand support if you only want to request support when you need it.

This way, you can choose the app development model that best suits your company and ensure the long-term stability of your app.

The cost of an app depends on its range of functions, the required interfaces, the design and the planned expansion. The more features and individuality are desired, the higher the investment requirement.

At Cayas, you will receive a clear, comprehensible offer without hidden items. This gives you full planning security from the very beginning, both in terms of budget and time frame.

In app development, we rely on modern technologies and many years of experience. Depending on the project goal and platform, different programming languages and frameworks are used:

  • Swift / Objective-C → for Apple platforms
    These languages are used for native iOS, iPadOS or macOS apps when maximum performance and deep hardware access are required.
  • Kotlin / Java → for Android platforms
    These languages are suitable for native Android apps that are to be optimally adapted to smartphones and tablets with Android.
  • C# (.NET MAUI) → cross-platform
    With .NET MAUI, we develop apps that run on both iOS and Android based on a common codebase. This reduces development and maintenance efforts, and new functions can be published faster.

This way, we can flexibly decide – depending on the budget, target group and range of functions – whether a native solution or a cross-platform app offers the most added value.

Regardless of the approach, we pay attention to high performance, reliable quality and a user-friendly app design, so that your application is convincing on all devices.

App Development Trainings

Learn App Development thanks to our workshops & trainings

Through our practice-oriented workshops and trainings, we help you to improve your knowledge and skills in app development. Regardless of whether you are a newcomer or an experienced developer, we will introduce you to the topics of cross-platform apps with .NET MAUI and Xamarin Forms in our trainings.

Information on trainings
An experienced developer from Cayas Software holds an app development training for a team of programmers.
Portrait of Sebastian Seidel – contact person for app development and digital projects at Cayas Software.

Take the next step in your app development now

Together we will realize your efficient and modern app on all devices. What you can expect from us as a service provider for app development:

  • Concept, design & programming from a single source
  • Transparent costs and clear time planning
  • Modern technologies for iOS, Android and Web
  • Long-term support on request

Start now with a non-binding consultation on app development and lay the foundation for your successful app project.