react native-tutorial

React Native vs Flutter

Since the introduction of Ionic, cross-platform apps have been a hot topic in the software industry, but React Native’s addition to its toolkit in 2015 increased interest even further. It transports you back to the era of React Native, when cross-platform frameworks weren’t specifically made for the creation of native apps. To give you the impression that you are running a mobile app, they were more interested in simply providing a WebView with access to native APIs and having your app run on that WebView. Since you can’t use all of your device’s processing power, this method has a performance penalty that is its main drawback. Which should you select between React Native and Flutter? is the topic of this article. They differ from one another, have code comparisons, and more.

With its pre-existing React.js framework, React Native adopted a different strategy and offered a way to build user interfaces utilising the Native UI blocks made available by the host operating system. On the device, the React.js library’s excellent performance provides an engaging view. During runtime, a Javascript Engine receives all of your Javascript code injections. The UI is positioned using the YOGA layout engine.

React Native performs admirably, but the Facebook team has discovered that it might have been far better. A single codebase can be used to build high-quality apps for Android and iOS using the open-source SDK called Flutter, which Google published in 2017.

Flutter utilises reactive-style views, just like React Native. Flutter, on the other hand, compiles all the way to native code while RN only results in native widgets. Flutter manages each pixel on the display, avoiding performance issues brought on by the requirement for a JavaScript bridge.

Similarities between React Native and Flutter

1. Native User Interface

While Flutter offers prefabricated Material and Cupertino (iOS style) widgets to create attractive UI on all platforms, React Native uses the fundamental UI blocks of each OS to create the Android / iOS UI.

2. Declarative UI

Declarative UI is used by both React Native and Flutter in place of imperative UI. Both of these create the user interface to reflect how your app is currently functioning. Here, we specify how our user interface will appear in a distinct state, and the framework keeps updating the UI whenever the state changes. This will improve the readability and maintainability of UI code.

3. Themes in the composition

Components (or widgets, as they are known in Flutter) that use composition, or the combining of many UI blocks to construct the UI, are both permissible in React Native and Flutter. Additionally, both share stateful and stateless components in common (also known as Widgets).

4. Stateful Hot Reload

Stateful Hot Reloads, which let users view changes in a matter of seconds while changing the codes, are used by both React Native & Flutter to speed up application development.

React Native & Flutter are far superior than native app development in terms of development time simply because of this capability.

Differences between React Native and Flutter

1. Language

The main driver of React Native’s success is the usage of JavaScript, a simple-to-learn language that enables web developers to create mobile apps using their existing JavaScript skills.

Dart, the language used by Flutter, is comparable to several contemporary object-oriented languages. The exceptional performance of flutter is due to dart’s attractive and robust language.

2. Neighborhood Support

Support for React Native is quite widespread and growing every day. It also contains a huge number of packages that may be used when developing thanks to the use of npm packages.

Flutter, on the other hand, is attempting to catch up while seeing a sharp rise in popularity.

3. UI Development

React Native makes use of JSX, which enables us to write HTML-like UI syntax inside of Javascript code. JSX enables users to construct UI that is simple to maintain and separates UI from business logic.

On the other hand, Flutter by default does not use JSX (or DSX, which is being explored in their Github problems), and instead employs nesting of numerous widget calls to generate UI, making huge UI appear cluttered and giving the classic “callback hell” impression to Javascript writers.

We can write UIs with fewer lines of code and without cluttered code even if the correct widget composition is followed.

Although I believe that if Flutter offers a two-way UI creation paradigm using something akin to JSX, it will prompt many React Native developers to immediately start designing apps in Flutter utilising their existing skills.

4. Code Evaluation

Without properly examining the fundamental hello world in both technologies, a comparison will be lacking. So let’s examine the corresponding source codes for React Native and Flutter:

// React Native
import React, { Component } from 'react';
import { StyleSheet, Text, View } from 'react-native';
export default class App extends Component {
  render() {
    return (
      <View style={styles.container}>
        <Text>Hello world!</Text>

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    alignItems: 'center',
    justifyContent: 'center'

// Flutter
import 'package:flutter/material.dart';
void main() {
      child: Text(
        'Hello, world!',
        textDirection: TextDirection.ltr,


It goes without saying that while both digital behemoths Google and Facebook continue to build cross-platform tools, cross-platform app development will face an uphill battle in the years to come. With an anticipated React Native Rewrite of its internal design to address the speed issue in React Native, it is now difficult to predict a winner.

This continued rivalry will be beneficial for the app development industry, and Flutter has been outstanding so far.

React Native has a larger community and is a more developed framework. Having said that, developers are giving Flutter a lot of encouraging comments even if it is still in its early stages. Google appears committed to promoting its framework, which is growing in acceptance. However, I would advise keeping an eye on both frameworks because they will shape how mobile apps are developed in the future, limiting the need for Native Platform Specific code to just the most extreme circumstances and shortening the time it takes to launch a mobile app.


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