The argument between cross-platform and native development isn’t new, but things are very different in 2025 than they were just a few years ago. The market is changing quickly because of big changes like React Native’s New Architecture and Flutter’s WebAssembly support. This makes it harder for UK businesses to choose. For a long time, the advice was clear from mobile application developers: build native apps for better performance and cross-platform apps for less money. That line is less clear now. Frameworks like Flutter and React Native now run almost as fast as native languages like Swift and Kotlin, which have become more streamlined. If you’re going to launch a digital product this year, you need to know about these changes. Here is what the best mobile application developers in the UK think you should do in 2025.

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Mobile Application Developers and The State of Mobile Development

The mobile app market in the UK is growing up. Users want things to work smoothly, load quickly, and have strong privacy protections, which are hard to provide with old, clunky code.

The difference between “native” and “cross-platform” performance has gotten a lot smaller since 2025. The Flutter 3.22 update from Google added support for WebAssembly (Wasm), which makes web apps run almost as fast as native apps. The React Native 0.82 update fully adopted its “New Architecture,” which got rid of the old communication bridge that used to slow down complex apps.

Native development hasn’t stopped, even with these improvements. Apple and Google are still pushing the limits of what Swift and Kotlin can do, especially for apps that need a lot of hardware integration or the highest level of security.

Native Development

To develop for native platforms, you need to make two separate apps: one for iOS (using Swift) and one for Android (using Kotlin). For a long time, it has been the best choice for high-performance apps.

When is Native the Right Choice?

Mobile application developers usually suggest native development for three specific situations:

1. Complex Hardware Integration

If your app needs a lot of device-specific features like ARKit, advanced camera controls, or complicated Bluetooth communication, native is safer. Cross-platform tools have plugins, but direct API access in native code is less likely to break when changes are made.

2. High-Security Requirements

Native apps are often preferred in fields like banking and healthcare (for example, apps that work with NHS systems). It lets you control data security in a very detailed way and makes it easier to follow the strict UK GDPR rules.

3. Maximum Performance

Native code running directly on the device’s processor is the best for high-fidelity gaming or tasks that require a lot of processing power.

The Downside of Native

The main problem is still the cost. You pay for both the iOS and Android development cycles. It means having to keep up with, test, and update two codebases.

Cross-Platform Development

Cross-platform frameworks let developers write code once and use it on both iOS and Android. Because it works so well, this method has become very popular among mobile application developers.

React Native

React Native is still a major player, especially for teams that are already familiar with web technologies. Version 0.82 changed things by making the New Architecture the default. This update lets JavaScript and native code talk to each other directly, which makes apps that use a lot of gestures run much faster.

Pros

• Huge Talent Pool: It’s easier to find developers in the UK who know JavaScript than it is for niche languages.
• Faster Iteration: “Hot reloading” lets mobile application developers see changes right away, which speeds up the build process.
• Strong Community: There are a lot of libraries out there, so you don’t have to build common features from scratch very often.

Flutter

Google’s Flutter is different in how it works. It doesn’t use native components; instead, it makes its own UI with the Skia graphics engine. This makes sure that every device has the same pixel-perfect look.

Flutter has fixed the “jank” problems that used to happen with Impeller on Android, so animations are now very smooth.

Pros

• Consistent UI: Apps look identical on older and newer phones, reducing QA time.
• Single Codebase: You can target mobile, web, and desktop from one project.
• High Performance: Compiled directly to machine code, it offers performance very close to native.

Kotlin Multiplatform (KMP)

Kotlin Multiplatform is a rising star in 2025. KMP lets you share only the business logic (the “brain” of the app) while keeping the UI native. This is different from Flutter or React Native. This gives you the best of both worlds: a native look and feel with shared core code.

Pros:

• Native UI: Users get the same look and feel as their OS.
• Flexible Sharing: You can share as much or as little code as you want.
• Risk Reduction: You don’t have to rewrite everything to use it because it works with existing native apps.

How to Decide a Framework

Your business goals, budget, and timeline will help you choose the right path. Experts in the field suggest this simple framework.

Choose Native if:

• You are building a high-end game or AR application.
• Budget is less of a concern than absolute maximum performance.
• Your app requires deep integration with specific hardware peripherals.

Choose React Native or Flutter if:

• You need to launch on both iOS and Android simultaneously with a limited budget.
• Your app is content-driven (e.g., e-commerce, social media, news).
• You want to iterate quickly based on user feedback.

Choose Kotlin Multiplatform if:

• You have an existing native Android team and want to expand to iOS.
• You need complex business logic but want to retain 100% native UI experiences.

UK-Specific Considerations

When you hire mobile application developers in the UK, think about the local job market. There are usually more JavaScript (React Native) developers available, which could lower hiring costs. Flutter is getting more and more popular, though, and a lot of agencies now focus on it.

Another important thing is following the rules. Make sure the framework you choose has strong libraries for handling user data in a way that is legal in the UK. Native development is often the easiest way to go, but cross-platform tools have come a long way and can handle secure data well if set up correctly.

Final Words

In 2025, the “native vs. cross-platform” war is largely over. Cross-platform tools have become so powerful that for 90% of business applications, they are the logical choice. They offer faster time-to-market and lower maintenance costs without the significant performance penalties of the past. However, native development retains its crown for specialized, high-performance use cases. The best approach is to consult with experienced mobile application developers who can assess your specific requirements.Do you want a custom app for your business? Just contact us and transform your vision into a reality.