Core Components and Native Components in React Native: A Complete Guide

If you are building a mobile app with React Native, you will quickly run into two terms: Core Components and Native Components. 

They sound similar, and they are closely related, but they are not the same thing. 

Understanding the difference helps you write cleaner code, debug faster, and decide when you need to go beyond what React Native gives you out of the box.

In this guide, you will learn what each term means, how React Native turns your JavaScript into real Android and iOS UI, and when it makes sense to build a custom native component.

What Are Views in Android and iOS Development?

In Android development, you write UI using Views. In iOS, you use UIViews. A view is the basic building block of the screen: a text label, an image, a button, a scrolling list, and a container that holds other views are all views.

Every visible thing in a native app is a view, and views can be nested inside each other to form the full screen. React Native builds on this idea.

What Are Native Components?

Native Components are the actual platform views that run on the device. On Android they are written in Kotlin or Java, and on iOS they are written in Swift or Objective-C. They are rendered by the operating system itself, which is why React Native apps look and feel like genuine native apps.

When you use React Native, you do not write these views directly. Instead, you describe your UI in JavaScript or TypeScript with React, and React Native creates the matching native views for you at runtime.

What Are Core Components?

Core Components are the ready-made, built-in components that ship with React Native. They are the JavaScript wrappers around the most common native views, so you can use them without writing any platform-specific code.

The most widely used Core Components include:

• View: a container for layout, similar to a div on the web
• Text: displays and styles text
• Image: displays images from local files or the network
• ScrollView: a scrollable container for content
• TextInput: lets the user type text

Other frequently used ones include FlatList, Button, Pressable, Switch, and ActivityIndicator.

How Core Components Map to Native Components

The key idea is simple: each Core Component is backed by a native component on each platform. At runtime, React Native looks at your component tree and creates the matching native views.

React Native Core Component	Android view	iOS view	Web equivalent
View	ViewGroup	UIView	div
Text	TextView	UITextView	p, span
Image	ImageView	UIImageView	img
ScrollView	ScrollView	UIScrollView	div with overflow: scroll
TextInput	EditText	UITextField	input

This mapping is why one codebase can produce an app that uses real Android and iOS controls rather than a web view pretending to be native.

A Simple Example

import React from 'react';
import { View, Text, Image, ScrollView, TextInput } from 'react-native';

export default function Profile() {
  return (
    <ScrollView>
      <View>
        <Text>Welcome to my app</Text>
        <Image
          source={{ uri: 'https://example.com/avatar.png' }}
          style={{ width: 100, height: 100 }}
        />
        <TextInput placeholder="Type your name" />
      </View>
    </ScrollView>
  );
}

On Android, this renders as ScrollView, ViewGroup, TextView, ImageView, and EditText. On iOS, it renders as the equivalent UIKit views. You wrote it once.

Core Components vs Native Components: Key Differences

Feature	Core Components	Native Components
Written in	JavaScript / TypeScript	Kotlin, Java, Swift, Objective-C
Provided by	React Native	The platform or your own native code
Cross-platform	Yes, one API	No, separate code per platform
Best for	Most everyday UI	Platform-specific or performance-critical features
Learning curve	Low for React developers	Higher, requires native knowledge

In short: Core Components are the interface you use, and Native Components are what actually draw on the screen.

What About Community Components?

React Native has a large ecosystem of third-party libraries. These components wrap native views that are not included in the core set, such as maps, video players, camera views, or charts. They follow the same pattern: a JavaScript layer on top, a native view underneath. For many apps, a community library is the quickest way to add a feature without writing native code yourself.

When Should You Build Your Own Native Component?

Most apps never need to. Consider building a custom native component when:

1. You need a platform view React Native does not expose, such as a specialized system control.
2. You already have a native view in an existing Android or iOS codebase that you want to reuse inside React Native.
3. Performance is critical and a native implementation clearly outperforms a JavaScript-driven one.
4. No suitable community library exists and you have the native expertise to build one.

If you only need to call native functionality that has no visual interface, such as accessing a sensor or storage API, that is typically handled with a native module rather than a native component.

Core Components and the New Architecture

React Native's New Architecture, built around Fabric (the rendering system) and TurboModules, changes how JavaScript and native code communicate. It makes the connection between your Core Components and the underlying native views faster and more direct. For most developers the way you use Core Components stays the same, while performance and consistency improve behind the scenes. If you author custom native components, follow the current official documentation for the architecture version your project targets.

Best Practices

• Start with Core Components. They cover the large majority of UI needs.
• Check community libraries first before writing native code.
• Keep platform differences small. Use Platform.OS or platform-specific files only where behavior truly differs.
• Test on real devices for both Android and iOS, since each renders with its own native views.
• Reserve custom native components for cases where the benefit clearly outweighs the added maintenance.

Frequently Asked Questions

What is the difference between Core Components and Native Components in React Native?

Core Components are the built-in JavaScript components, such as View and Text, that you use in your code. Native Components are the real Android and iOS views those components render to on the device.

Is the React Native View the same as a native view?

Not exactly. View is a Core Component that React Native converts into the platform's native view, such as ViewGroup on Android or UIView on iOS.

Do I need to know Kotlin or Swift to use React Native?

No. You can build a complete app using only Core Components and community libraries. Native knowledge becomes useful when you create custom native components or modules.

Can I mix Core Components and custom Native Components in one app?

Yes. Custom native components are used in JavaScript just like any other component, so they sit comfortably beside Core Components in the same tree.

Are React Native apps really native?

They render using real native views, which is why they match the look, feel, and accessibility behavior of each platform, unlike apps that render inside a web view.