Building Our Applications Using Flutter

Sonia Singla 22 Nov, 2022 • 8 min read

This article was published as a part of the Data Science Blogathon.


Flutter where F stands for Front- end, L stands for Language, U stands for UI layout, T stands for Time, T stands for Tools, E stands for Enable, and R stands for Rich.

In other words, Flutter is a tool used in building cross-platform apps where less development cost and less time are used for developers to develop stunning outlook apps of iOS and Android applications with just one source code.

An object-oriented programming language, DART, is often used by developers with Flutter.

On its first launch in 2018, it was mainly mobile based but later supported six platforms, Windows, Linux, Android, macOS, Web, and iOS.

Is Flutter required for a data scientist?

If we think about the answer to this question, we should understand that making an AI app with a deep learning model requires further help that our app runs on Android. We need a platform, and Flutter helps make the app in less time.

Why Flutter?

Using a single rendering engine, independent of platform-specific UI components and usable for any target platform, the app’s UI and logic would not change in any way. It will reduce losses and business risks.

Experts can comprehend that each cross-platform framework provides users with a unique method for sharing codebases between your target platforms. The Business Logic and UI are identical across all platforms. Beyond Flutter, there would be no proper application frameworks that would permit you to share. It makes it easier to build an app, giving it a more natural look on all common platforms. Data synchronization for the framework widget would be required if you used platform-specific components to handle rendering.

We will be using the open-source framework developed by Google known as Flutter, which Front end developers use to make applications for many platforms by using single code.

Now we know about the Flutter and what it means. Let us go further for installation.

Installation of Flutter

1. First, we will download the Flutter on the window.

2. paste this command on the terminal

 git clone -b stable

3. Then we will edit environment variables and types of values on the Path variable flutterbin location in your pc.

4. Now open the terminal and type where flutter dart. It should mention the path where the dart is now.


5. Now, to know which dependencies we require in our pc, we run the command flutter doctor on the terminal.

6. We can see from the image we are missing three pieces of software, an android toolchain, Visual Studio, and Android Studio.


7. Before going further, we will install the dependencies required.

8. All the links on the terminal can help us install the missing tools.


9. Now we have all the dependencies installed and can move forward.

10. Open the VS Code and install the extension Flutter by following the steps.

Installing the Extension

1. From the View tab, choose Command Palette and type install.

2. Choose Extensions installed extensions, and in the search type, Flutter, and install Flutter with the DART plugin.

install Flutter

3. We here choose Flutter to download.

install Flutter

Now, let us start with it.

4. After downloading, we type doctor and choose Flutter: Run Flutter Doctor.

To run a program, we will use the command.

install Flutter

5. Tab View, choose Command Pallete and type Flutter, and press on Flutter run docker.

It’s necessary to run using the above command to enable the app’s built-in docker.

app built in

6. Choose the application to generate the application, choose the folder and then type the name as my_app and enter.


7. Next, we choose the name of the folder.

8. Press Run and choose to start debugging.

9. Now open the main .dart file with notepad, change the pushed to click, and save the file.

Most importantly, it expects the “main. dart” file to exist once our project or application gets created. We should not rename or delete the file, as it always looks for the main .dart file. However, you can modify the content as you see fit.

10. The main .dart file in the image is showing. We will update the contents without changing the name.


Notice the updated string in the running app.

11. Now, let us run our first application. Open the main .dart file and replace all the contents with the script mentioned below to run Hello World.

// Copyright 2018 The Flutter team. All rights reserved.
import 'package:flutter/material.dart';
void main() {
  run-App(const MyApp())
class MyApp extends StatelessWidget {
  const MyApp({super.key});
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Welcome to Flutter'
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Welcome to Flutter')
        body: const Center(
          child: Text('Hello World'),

The below image shows Hello World displaying, which means our code is working fine.


Advantages and Disadvantages

1. Reduction in overall code development time. When you want to build a mid-sized Android app, shipping it to any test device would take at least 40 seconds. Any minor adjustment to the visual layout would take a very long time after a few attempts. It might appear easy when viewed in the Android Studio layout preview. However, this feature has its restrictions and would not function as expected. Custom views may also be a part of this.

2. Increase in the Speed of Time to Market. As can be seen, this feature is straightforward. The fact that the Flutter development framework would operate much more quickly than any of its alternatives merits our attention. Compared to the same app developed separately for iOS and Android, you can typically anticipate that any Flutter app will require at least twice as many hours.

Like Native App Performance, the best user experience relies heavily on the app’s performance. It is safe to say that its application performance, comparable to any native app, is currently the most sought-after platform in the market. It might be able to stand out more against any complicated UI animation scenarios.

3. Animated and custom UI at any complexity level. The main feature is the ability to customize anything and everything you see on your screen. It ignores the complexity of its components. The amount of work required would vary depending on whether you can handle any native platform-specific custom UI.

4. Flutter has a version of the engine that enables you to manage the activities you perform with your apps. None of these options may exist on any platform. Without a cross-platform rendering engine that performs well, many of the factors we have demonstrated would be invalid.

In addition to the user interface, many real-world mobile applications would rely on any advanced OS-level features. Simple, platform-oriented logic implementation can occur due to Bluetooth communication, retrieving GPS coordinates, permission management, sensor data collection, working with various credentials, Platform-oriented logic implementation, and so on. Additionally, they wish to let people take advantage of the Flutter SDK’s advantages. At Pattern Digital, we can explain the advantages of the Flutter app that have allowed users to get the most out of it in recent years.

Learn more about the Flutter SDK, the Flutter framework, the Flutter app development process, the Flutter native app development process, and the Flutter DART. All of this makes the rendering process easier to control. It also makes it easier to build an app, giving it a more natural look on all common platforms. Data synchronization for the framework widget would be necessary if you rely on platform-specific components and logic implementation to handle rendering. It enables us to comprehend why Flutter is the most effective and quickest method for delivering a cross-platform mobile application that performs well. Keep in mind that Flutter will soon become the best cross-platform UI framework.

5. Chance to Go Beyond Mobile. With Flutter, you can go beyond mobile app development. Additionally, you now have a desktop and web Embedded Flutter. Google then presented a comprehensive technical preview for Flutter Web at the I/O conference. It can run Flutter apps in your browser without changing the source code.

Yes, Flutter is the best option for businesses to develop mobile apps. Any company can suffer financial losses due to problems with a platform or technology. Flutter is the best business solution for adapting to new technologies.

6. Flutter in social networking. There are numerous apps for sharing, creating, and discovering various content types, including images and articles. Any user could form any page to showcase any of their content on Flutter for Social networking. They may also gain community recognition as a result of this. React Native app developers may find it easier to customize their apps when they can easily create them. Flutter is now a complete cross-platform development tool widely used. With Flutter, you can anticipate a fully assembled app release.

7. Health & Fitness. The app Reflectly is an artificial intelligence-based journal. Any user would be able to think about and organize their problems and ideas in general. Flutter does not require interaction with any native app to implement any 2D-based UI.

Because the code interpreter deals with native code on older devices, apps created operate a little more slowly on those devices. Numerous tests demonstrate that the CPU directly affects how well flutter-based apps run.

Since Flutter is a cross-platform language, apps created with it don’t have the same feel as native apps; the appearance and functionality are a little different, but the essential functionality is still present. In contrast to native applications, which run for a single platform, flutter apps for cross-platform devices, so the app must be in the same position to function on both platforms.


We discussed in detail why we need Flutter for making our app. For the developers, there are many challenges related to the application. After COVID-19, many small business makers also tend to have apps for their businesses. Challenges faced by many developers are as mentioned below.

  1. To choose the right technology and right approach for mobile applications.

  1. Cross-platform application often results in lengthy codes for two platforms and is expensive.

  1. Compatible UX design applications for different screens size.

Front-end developers work on the front part of websites which is visible to the users and through which users interact. They require a solution for making applications that run on different platforms using single-based code without making lengthy code.

No matter what operating system the app is running on, the development tools’ graphics library and material design enable speedier app operations while still delivering the app. Flutter’s ability to construct cross-platform apps is its benefit. No need to design apps separately for each platform when using Flutter to create iOS and Android apps in one step.

Some of the key takeaways are as follows:

1. Definition

Google created Flutter, an open-source framework with a single codebase, front-end, and full-stack developers who may develop an application’s user interface (UI) on various platforms.

2. Installation step by step of Flutter on windows.

We created our first application through Flutter, where we learned the installation step by step on windows. Then we discussed its meaning. Flutter-created apps can run on both platforms (iOS and Android). It may benefit businesses since they will need fewer developers to create an app that runs on both platforms.

Since fewer developers are required, the cost associated with creating the app is also lower.

3. Time Constraint: The less time needed to release the app into the market. After installation, we created our first app Hello World. We also tried to determine whether it could be a better choice for an AI app.

The media shown in this article is not owned by Analytics Vidhya and is used at the Author’s discretion.

Sonia Singla 22 Nov 2022

Frequently Asked Questions

Lorem ipsum dolor sit amet, consectetur adipiscing elit,

Responses From Readers


maheshDM 20 Feb, 2023

Great Information on building applications by using Flutter and well said about Advantages & Disadvantages. Thanks for the Informative content! I suggest that Flutter app development companies are a great choice for businesses and individuals who want to develop mobile apps that provide an outstanding user experience.

Machine Learning
Become a full stack data scientist