As specialists in mobile app development, we develop your cross-platform app with .NET MAUI – efficient, future-proof, and perfectly tailored to your business. Over 10 years of experience, starting with Xamarin.
Learn MoreDo you want an app that works on all major devices—iPhone, Android smartphones, tablets, and even PCs or Macs—without having to be developed multiple times? That's exactly what cross-platform app development delivers: a single codebase that runs on iOS, Android, and optionally Windows and macOS.
At Cayas, we build on .NET MAUI (Multi-platform App UI), Microsoft's modern framework that evolved from Xamarin. With over 10 years of experience in cross-platform development—starting with Xamarin, now with .NET MAUI—we know exactly when this approach is the right one and when it isn't.
The key difference from hybrid web apps like Ionic or Cordova: .NET MAUI compiles to genuine native code and uses native UI components for each platform. The result feels like an iOS app on iOS and an Android app on Android. For B2B apps with backend integration, complex business logic, and offline capability, this is a decisive advantage over web-based approaches.
Who benefits most from cross-platform development? Primarily businesses that want to serve users on iOS and Android equally, already run a .NET backend or Microsoft infrastructure, and don't have the time or budget for two separate development teams.
Schedule a Free ConsultationWhether you're starting a new project or modernizing an existing app, a cross-platform app gives you excellent performance on all devices, greater reach, less effort, and maximum flexibility. Based on our experience across many cross-platform projects: the decision for a cross-platform approach pays off in most B2B scenarios after the very first update cycle.
Your app looks and feels great on all iOS and Android tablets, laptops, and smartphones—consistent and familiar for every user.
Less implementation effort means your app is ready sooner—iOS and Android go live at the same time.
A single codebase significantly reduces development and maintenance costs—typically 30 to 40 percent compared to two native apps.
Changes and updates are implemented centrally and apply immediately to all platforms and operating systems.
Anyone exploring cross-platform app development quickly encounters three names: .NET MAUI, Flutter, and React Native. All three are established frameworks—but they don't fit every project equally well. We have evaluated all three and work with .NET MAUI every day. That gives us the basis for an honest comparison rooted in project experience, not marketing.
Microsoft's .NET MAUI is the direct successor to Xamarin and our primary app framework for cross-platform projects. What sets it apart:
Honest limitation: the community is smaller than Flutter's or React Native's, and the third-party package market is less diverse. Teams without C#/.NET experience will need either an experienced partner or should evaluate one of the other frameworks.
Google's Flutter has built a large community quickly. Anyone comparing Flutter vs. React Native or Flutter vs. .NET MAUI will notice Flutter has a distinct strength in visually rich apps with custom design.
Our take: Flutter is a strong choice for fast MVPs with custom UI—less ideal when the backend speaks .NET or a truly native feel on all platforms is important.
Meta's React Native is the oldest of the three frameworks and has the largest JavaScript community behind it. For teams already working with React, the learning curve is low.
Our take: React Native is a solid choice for teams with strong JavaScript expertise—but when the project scales or tight backend integration is needed, its limitations surface faster.
Our short formula after many framework decisions in real projects:
We recommend .NET MAUI—not because it is the only right framework, but because we have mastered it for over 10 years and can deliver the highest quality with it. If your requirements point to a different framework, we will tell you openly.
Cross-platform is the right choice when:
From our experience: the majority of B2B apps that come to us are cross-platform candidates. Workflow apps, logistics tools, field service applications, employee apps—these are exactly the cases where .NET MAUI excels.
Native app development is the better choice when:
If native development is the right path for you, we also offer native iOS app development and native Android app development. We help you make the decision together.
App development is more than just technology—it requires a strong partnership built on trust, communication, and a genuine interest in your project. That's what we stand for at Cayas.
For over 12 years, we have been developing digital applications for businesses, always with the goal of delivering not just functional software, but solutions that truly make a difference. Our process is agile, transparent, and designed so that you always know exactly where your project stands.
How We Work With You:
Our technology decisions are based on what works in real projects—not on hype. At the center is .NET MAUI as our primary app framework for cross-platform development, embedded in the proven Microsoft and .NET ecosystem.
Our primary framework. Successor to Xamarin, actively developed by Microsoft. Native UI on iOS, Android, Windows, and macOS from a single codebase.
Type-safe development with full access to the .NET ecosystem. MVVM pattern for clean separation of UI and business logic.
Automated build and deployment pipelines for faster releases, fewer manual errors, and greater transparency throughout the development process.
Still running a Xamarin app? We migrate it to .NET MAUI. See our Xamarin to .NET MAUI migration page for details.
The most common misconception we encounter in initial conversations: clients expect cross-platform to be dramatically cheaper than native development. The truth is more nuanced—but the cost advantage is real and substantial.
With a shared codebase instead of two separate native apps, you typically save 30 to 40 percent of development costs. The advantage comes from reuse—not from lower quality. We deliver the same standard as native development, with significantly less duplicated effort.
Cross-platform is not automatically cheap—a poorly planned cross-platform app can become just as expensive as a native one. The difference lies in the right architecture and an experienced team that knows the pitfalls.
Where Cross-Platform Concretely Saves Money:
A detailed breakdown of cost drivers, realistic price ranges, and where you can save is available on our app development costs page.
We don't just develop cross-platform apps on paper—here are three projects where cross-platform development made a concrete difference.
CLAAS had a clear requirement: both apps had to feel native on iOS and Android while sharing a high proportion of reusable code. We delivered exactly that with Xamarin. The app was so well received that service technicians started using it in the field too—driving device counts to 3 to 5 times the original estimate. We optimized performance using native profiling tools without abandoning the shared codebase.
Read Case StudyFor flaschenpost's driver app, we integrated a Java-based navigation SDK into the cross-platform app via a Xamarin binding—completed in four weeks. We later migrated the app from Xamarin.Forms to .NET MAUI, applying our migration expertise directly. flaschenpost now saves measurable time per route thanks to the improved navigation—multiplied across thousands of deliveries a year, the impact is significant.
Read Case StudyMEDIFOX DAN's CareMobile app was technologically outdated and ran exclusively on Android. Cayas took over the migration to .NET MAUI under real time pressure, with a trade fair deadline as a hard target. The result: a cross-platform app for iOS and Android, a modernized architecture, and an internal development team equipped to maintain and extend the app independently through workshops and code reviews.
Read Case StudyFAQ
A cross-platform app is built from a single codebase that runs on iOS, Android, and optionally desktop platforms like Windows and macOS. Native apps are developed separately for each platform—Swift for iOS, Kotlin for Android.
Cross-platform saves cost and shortens time-to-market, but can be less flexible for deeply hardware-specific requirements. For most B2B apps, cross-platform is the better choice today. If native development is the right path for you, we also offer native iOS app development and native Android app development.
There is no universally best framework. Flutter by Google, React Native by Meta, and .NET MAUI by Microsoft are the three established options—each with genuine strengths.
Cayas builds on .NET MAUI because we have accumulated C#/.NET expertise since the Xamarin era, and our B2B clients frequently already use .NET backends or Microsoft infrastructure. The full comparison with honest pros and cons is further up on this page.
Yes. Microsoft officially retired Xamarin.Forms on May 1, 2024, replacing it with .NET MAUI (Multi-platform App UI). .NET MAUI is technically more mature, better integrated into the .NET ecosystem, and actively maintained.
Cayas has successfully migrated numerous Xamarin apps to .NET MAUI. If you are running a Xamarin app, you should address the migration soon. Technical details are available in our blog post on Xamarin migration and on our Xamarin to .NET MAUI migration page.
For most B2B use cases, yes. .NET MAUI uses native UI elements and has no performance overhead compared to older hybrid frameworks. Limitations appear in graphics-heavy apps or deeply hardware-specific requirements such as intensive camera processing or 3D rendering.
For workflow apps, forms, data visualization, and backend integration—the core of most B2B apps—performance is fully comparable to native development.
At Cayas, we start every project with an individual analysis and provide a realistic time estimate early on, including milestones for your planning security. As a general guide:
That depends on the scope of features. As a rough guide: simple apps start at around EUR 15,000, mid-size projects range from EUR 30,000 to 80,000, and complex enterprise solutions can go beyond that.
Compared to two separate native apps, cross-platform typically saves 30 to 40 percent of development costs. A detailed breakdown of cost drivers, realistic price ranges, and where you can save is available on our app development costs page.
.NET MAUI supports iOS, Android, Windows, and macOS from a single codebase—particularly useful for businesses that want to equip their teams on both desktop and mobile with the same app.
Flutter also supports desktop, with varying maturity per platform. React Native focuses primarily on mobile. If you need a mobile and desktop app from one team, .NET MAUI is the strongest option.
Our expert team for cross-platform app development with .NET MAUI is happy to help. Let's find out together which framework and approach is the right fit for your project.