SwiftUI vs UIKit in 2025

Introduction

If you've been researching iOS development, you've definitely come across these two names: SwiftUI and UIKit. These are the two main frameworks used to build user interfaces on iPhone and iPad.

Which one should you choose in 2025?

The answer depends on your project. Here's an honest comparison, based on my 6 years of iOS development experience.

UIKit: the historical foundation of iOS

UIKit has been around since iOS 2 (2008). For over 10 years, it was the only way to build native iOS interfaces.

It's imperative - meaning you tell the app exactly how to do every single thing.

UIKit advantages:

• Maturity - thousands of resources, tutorials, and solutions to known problems
• Precise control over every pixel and every animation
• Essential for certain advanced features (some Apple APIs aren't yet supported in SwiftUI)
• Rock-solid for large existing codebases

Disadvantages:

• Verbose - a lot of code for simple results
• Steeper learning curve for beginners

SwiftUI: Apple's vision for the future of iOS

SwiftUI was introduced in 2019. It takes a declarative approach: you describe what you want to display, and the framework handles the rendering.

Less code, more productivity.

SwiftUI advantages:

• Faster development - much less code for the same visual result
• Real-time previews in Xcode (Canvas)
• Shareable across iOS, macOS, watchOS, and tvOS from the same codebase
• Clearly Apple's chosen direction for the future

Disadvantages:

• Some advanced APIs still require falling back to UIKit
• Occasionally unpredictable behavior on iOS versions older than iOS 16

What to choose in 2025?

For a new project targeting iOS 16+, SwiftUI is the right choice in the vast majority of cases.

It's faster to develop, easier to maintain, and better supported by Apple's modern tooling.

UIKit still makes sense in three situations:

• Maintaining an existing app
• Needing very fine control over animations
• Integrating third-party libraries that haven't yet been updated for SwiftUI

💡 In practice, both often coexist in the same app. It's entirely common to use SwiftUI as the primary framework while calling into UIKit occasionally via UIViewRepresentable.

Conclusion

There's no universal answer -it all depends on your project, constraints, and the minimum iOS version you want to support.

If you have an iOS project in mind and want to choose the right architecture from day one, feel free to reach out.