Flutter and native iOS/Android development are two different approaches to building mobile apps.

Native iOS/Android development involves using the official programming languages and development environments provided by Apple and Google, respectively.
For iOS, developers use Swift or Objective-C, and for Android, they use Java or Kotlin. Flutter, on the other hand, is a mobile app SDK that uses the Dart programming language. It allows developers to build apps for both iOS and Android platforms with a single codebase, using a reactive programming model and customizable widgets. Here are some factors to consider when deciding between Flutter and native development:

1. Development Time: Flutter allows developers to build apps faster because they can write code once and deploy it on both iOS and Android platforms. With native development, developers need to write separate codebases for each platform, which takes longer.
2. User Experience: Native apps tend to offer a more polished user experience because they are optimized for their respective platforms. Flutter tries to emulate the platform-specific design guidelines and provides widgets that look and feel like native ones. However, some users may still notice subtle differences.
3. Performance: Native apps typically offer better performance than Flutter apps. This is because native apps are compiled into machine code specific to the platform, whereas Flutter apps run on a virtual machine. However, Flutter has made significant performance improvements in recent releases.
4. Developer Skillset: If you have developers who are already experienced with Swift, Objective-C, Java, or Kotlin, then native development may be a better fit for your team. If your team is already familiar with Dart or comes from a web development background, then Flutter may be a better option.

Overall, both Flutter and native development have their pros and cons. It ultimately depends on your project requirements, team skillset, and priorities.