Cross-Platform
Xamarin and .NET MAUI
By using .NET MAUI (formerly Xamarin), we create your applications cross-platform, saving around 30 percent in development time and costs by designing user interfaces only in XAML.
Mobile App Development
As specialists in app development, we create your app for cross-platform, iOS, and Android, tailored to your company.
Request a Free Quote NowFrom concept to app programming, design, and maintenance
Through cross-platform expertise and modern technologies
Custom apps tailored to your target audience
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.
From the idea and app design to launch and continuous further development, we reliably and transparently guide your project.
We are experts in iOS, Android, cross-platform, and web applications tailored to your requirements.
As an app agency, we plan and develop apps flexibly, modularly, and with the services you truly need.
As experienced app developers, we ensure performance, stability, and a sustainable app architecture.
What do you need?
The Perfect Mobile App
Custom App Development
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
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 ProgrammingA 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 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.
Discuss App Development for Free»Cayas Software is an excellent team! I personally enjoyed the energy and professional support that the entire team gave us during the project.«

App Development Agency
FAQ
.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:
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:
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.
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:
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:
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:
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
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

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