If your app still runs on Xamarin, it is running on borrowed time. Microsoft ended official support for Xamarin in 2024, and businesses that delay action now face real risks, from app store rejections to security gaps that put user data at stake. This guide walks you through why migration matters, what your real options are, and how the Xamarin to .NET MAUI migration process actually works, in plain, practical terms. AHA Technocrats helps businesses handle this transition smoothly, alongside our broader mobile app development and website development services.
Why Xamarin Users Can No Longer Wait
Many businesses assume an old app can just keep running quietly in the background. With Xamarin, that assumption no longer holds true, and the risks grow every month you wait.
App Store and Play Store Compliance Issues
Apple and Google both raise their technical requirements regularly, and Xamarin can no longer keep up. Since Xamarin stopped receiving updates, its final supported versions cannot meet the newer SDK requirements that Apple’s App Store now demands for any new upload. This means a Xamarin-built iOS app can get stuck completely, unable to be updated or resubmitted at all.
On Android, the situation is a little different but just as serious. Existing apps may still work for now, but the moment you need to push even a small update, including a critical security fix, Google Play holds you to a higher technical standard than Xamarin can support. This gap only gets wider as both app stores continue raising their requirements every year.
Security Risks From an Unsupported Framework
An unsupported framework does not become unsafe overnight, but the risk builds quietly over time. Since Xamarin no longer receives security patches, any new vulnerability discovered in the framework or its dependencies simply stays unfixed. This leaves your app, and your users’ data, exposed to risks that would normally get patched within days on a supported platform.
For businesses handling any kind of sensitive user information, payments, personal details, or business data, this is not a risk worth carrying for long.
Rising Maintenance Costs Over Time
Keeping a Xamarin app alive gets more expensive every year, not less. As the developer community shifts toward .NET MAUI, finding skilled Xamarin developers becomes harder and pricier. Simple tasks that once took a quick plugin now require custom, time-consuming workarounds, since the plugin ecosystem around Xamarin has stopped growing. Businesses that delay migration often end up paying more in ongoing patchwork fixes than they would have spent on a planned, proper migration.
Xamarin vs .NET MAUI: What’s Actually Changed
.NET MAUI is not a completely different technology, it is Microsoft’s official evolution of Xamarin.Forms, built to fix many of Xamarin’s long-standing limitations. The biggest structural change is the move from Xamarin’s renderer-based architecture to a new handler-based architecture in .NET MAUI, which results in faster app performance, smaller app sizes, and smoother UI rendering.
.NET MAUI also introduces a single-project structure, meaning developers can manage iOS, Android, and other platform code more efficiently within one unified project, instead of juggling separate platform-specific projects like Xamarin required. On top of this, .NET MAUI benefits from ongoing updates, active community support, and long-term backing from Microsoft, all things Xamarin no longer offers.
Your Three Real Options: Migrate, Rewrite, or Freeze
Not every business needs to rush into a full migration immediately, but every business does need to make an intentional choice, rather than letting the decision happen by default.
Migrate to .NET MAUI works best if your existing Xamarin app has a solid structure and you want to preserve your current investment while modernizing the technology underneath it. This is usually the fastest and most cost-effective path for most businesses.
Rewrite from scratch, sometimes using a different framework like Flutter or React Native, makes sense if your original app has significant technical debt, outdated architecture, or if your business needs have changed enough that a fresh build serves you better long term.
Freeze the app as-is is only a short-term option, and a risky one. This means accepting that your app cannot receive updates, security patches, or new features, and eventually, it may stop working entirely as app store requirements continue to rise. This path should only ever be a temporary holding position, not a long-term strategy.
Before You Begin: A Practical Pre-Migration Checklist
A successful migration starts before any code changes happen. Going through this checklist first saves time, reduces surprises, and helps you plan a realistic timeline.
- Review your current Xamarin app’s codebase to understand its size, complexity, and any custom renderers or platform-specific code it relies on
- Check which third-party libraries and plugins your app uses, since some may not yet have direct .NET MAUI equivalents
- Back up your entire project before making any changes, this step is non-negotiable
- Set up a proper .NET MAUI development environment before starting any code work
- Make sure your team understands the key differences in project structure between Xamarin and .NET MAUI
- Review your app’s UI and UX design, since migration is a good opportunity to modernize outdated screens instead of simply porting them over as-is
- Set a realistic timeline and budget based on your app’s complexity, not just a rough guess
How the Migration Process Actually Works
Once your checklist is complete, the actual migration follows a clear, structured path.
Assessing Your Existing Xamarin App
Every migration starts with a full audit of the existing app, its architecture, dependencies, custom code, and any platform-specific features. This step tells you exactly how much work lies ahead and helps set a realistic budget and timeline.
Choosing Manual or Automated Migration
Microsoft provides a .NET Upgrade Assistant tool that can automate parts of the migration, updating namespaces, project files, and basic structure changes. However, automated tools rarely handle everything perfectly. Most real-world migrations use a mix of automated tools for repetitive changes and manual work for custom renderers, complex UI components, and platform-specific logic.
Updating Project Structure and Dependencies
Xamarin projects typically split code across multiple platform-specific projects. .NET MAUI consolidates this into a single project structure, so this step involves reorganizing your codebase and updating outdated dependencies to their .NET MAUI-compatible versions.
Migrating UI Components and Platform-Specific Code
This is usually the most time-consuming part of the process. Xamarin’s custom renderers need to be converted into .NET MAUI’s handler-based system, which works differently under the hood. Any platform-specific code also needs careful review to make sure it still functions correctly in the new architecture.
Testing Across Devices and Platforms
Testing cannot be an afterthought here. Every migrated screen and feature needs testing across multiple devices, screen sizes, and operating system versions to catch issues before they reach real users. This includes both automated testing and manual checks on real devices, not just simulators.
Deployment and Post-Migration Support
Once testing confirms everything works as expected, the migrated app moves through deployment, first to app stores for review, then to your users. Post-migration support matters too, monitoring for any issues that surface after launch and addressing them quickly keeps user trust intact.
Can You Migrate in Phases, or Does It Need to Happen All at Once?
Good news: migration does not have to happen in one massive push. Many businesses successfully migrate in phases, tackling one module or feature at a time rather than rewriting the entire app in a single effort.
This phased approach works especially well for larger, more complex apps, since it reduces risk, allows continuous testing along the way, and lets your business keep the app running normally while migration happens in the background. Smaller apps with simpler architecture may migrate faster as a single project, but even then, breaking the work into clear stages, assessment, core migration, UI updates, testing, helps keep the process manageable and predictable.
Common Migration Challenges and How to Handle Them
Every migration comes with a few common hurdles. Teams often need time to relearn the new project structure, since .NET MAUI organizes code differently than Xamarin did.The shift from custom renderers to handlers also takes some adjustment, since it changes how UI customization works under the hood.
Some third-party libraries your Xamarin app relied on may not yet have direct .NET MAUI equivalents, which sometimes means finding alternative packages or writing custom solutions. Platform-specific code also often needs rework, since certain Xamarin-specific implementations do not carry over directly.
The good news is that none of these challenges are unusual or unsolvable, they are simply part of a normal migration process, and working with a team experienced in .NET MAUI significantly reduces the time spent troubleshooting these issues.
Performance Gains You Can Expect After Migration
Migration is not just about staying supported, it also brings real, measurable improvements. Apps built on .NET MAUI typically launch faster than their Xamarin counterparts, thanks to the more efficient handler-based architecture. App sizes also tend to shrink, which means faster downloads and installs for your users.
Memory management improves too, reducing the kind of slowdowns and crashes that older Xamarin apps sometimes experienced over time. UI interactions feel smoother overall, since .NET MAUI’s rendering approach is more modern and efficient than Xamarin’s older renderer system. For businesses, this often translates directly into better user reviews and lower app abandonment rates.
How Long Does the Migration Take, and What Does It Cost?
Timeline and cost depend heavily on your app’s size and complexity, but here is a realistic general picture. A simple app with minimal custom UI and few third-party dependencies might migrate in a few weeks. A medium-complexity app with several custom screens and integrations often takes one to two months. Large, complex apps with heavy customization, multiple integrations, or extensive platform-specific code can take longer, sometimes a few months, especially if migrating in careful, tested phases.
Cost follows a similar pattern, tied directly to app complexity rather than a fixed number. Simpler apps cost less to migrate since less custom code needs rework. Apps with heavy customization or numerous third-party libraries usually cost more, since more manual work is involved. The most cost-effective approach is almost always planning ahead rather than waiting until your app breaks or gets rejected, emergency migrations under pressure tend to cost more than planned ones.
Should You Migrate It Yourself or Work With a Development Partner?
If your business has an experienced in-house .NET development team already familiar with modern .NET practices, a self-managed migration is possible, especially for smaller, simpler apps. If not, AHA Technocrats has hands-on experience with exactly this kind of migration. Our .NET developers can work alongside your team as an extension of your in-house resources, or if you are looking for contract-based developers to handle the entire migration independently, we provide that option too.
An experienced partner brings practical migration experience, having already solved the common challenges, library gaps, and platform-specific quirks that slow down teams migrating for the first time. This usually means a faster, smoother migration with fewer surprises along the way, and a lower overall risk of costly mistakes.
How AHA Technocrats Supports Your Xamarin to .NET MAUI Migration
AHA Technocrats helps businesses migrate their Xamarin apps to .NET MAUI smoothly, without disrupting their existing users or operations. Our team starts with a full assessment of your current app, then builds a clear migration plan tailored to your app’s complexity and your business timeline.
Beyond migration, our mobile app development services cover building new cross-platform and native apps from the ground up, so whether you are modernizing an existing app or starting fresh, our team supports you at every stage. We also offer website development services for businesses looking to strengthen their full digital presence alongside their mobile app, giving you one trusted team to handle your technology needs across platforms.
Frequently Asked Questions
What happens to my Xamarin app if I don’t migrate?
Your app will continue running for existing users in the short term, but it will not receive security updates or bug fixes, and you may eventually face app store rejections when submitting updates, especially on iOS.
Will migrating to .NET MAUI change how my app looks or works?
Migration itself does not have to change your app’s core functionality or design, but many businesses use the opportunity to modernize outdated UI elements. The end result should feel familiar to your existing users while running on more stable, modern technology.
Is .NET MAUI a safe long-term investment for cross-platform apps?
Yes, .NET MAUI is Microsoft’s official, actively supported successor to Xamarin, receiving regular updates and long-term backing, making it a safer long-term choice than staying on an unsupported framework.
Can I keep some parts of my app on Xamarin while migrating others?
Yes, phased migration allows you to migrate specific modules or features gradually rather than rewriting the entire app at once, which works well for larger, more complex applications.
Conclusion: Acting Early Costs Less Than Acting Late
Xamarin’s end of support is not a distant concern, it is already affecting real businesses through app store rejections and rising security risks. Whether you choose to migrate, rewrite, or plan a careful phased transition, the key is making an intentional decision now rather than waiting until your app breaks.
AHA Technocrats helps businesses navigate this transition confidently, backed by our broader expertise in mobile app development and website development. If your business is still running on Xamarin, the smartest move is starting the conversation about migration today, before app stores force the decision for you.
