Understanding Publishing and Deployment in FlutterFlow

Platform Compatibility

FlutterFlow supports cross-platform development, allowing you to create apps for both iOS and Android from a single codebase. Before publishing, ensure that your app’s design and functionality are optimized for each platform to deliver a consistent and polished user experience.

Connectivity with Firebase

Firebase integration is integral to the publishing and deployment process in FlutterFlow. Connect your app to Firebase for features such as authentication, real-time databases, and cloud functions. Firebase Hosting facilitates the deployment of web apps, while Firebase Cloud Functions handle server-side logic.

Configuring App Settings

FlutterFlow provides a user-friendly interface to configure app settings. Define details such as the app’s name, icon, splash screen, and other metadata. Pay attention to these settings, as they contribute to the overall branding and presentation of your app on users’ devices.

Building and Compiling

Use FlutterFlow’s build and compile features to generate the binaries necessary for deployment. Ensure that your app is optimized for performance and that any debug features are disabled in the release build. FlutterFlow’s build process streamlines this, making it a smooth experience for developers.

App Store and Google Play Submission

FlutterFlow simplifies the submission process to the App Store and Google Play. Follow the guidelines provided by each platform to create a developer account, submit necessary information, and upload your app. FlutterFlow’s integration ensures that your app complies with the submission requirements.

Web Deployment in FlutterFlow

FlutterFlow’s support for web deployment allows you to reach a broader audience. Optimize your app for the web by addressing responsiveness and ensuring compatibility with various browsers. Firebase Hosting facilitates the deployment of your Flutter web app with ease.

Continuous Integration and Deployment (CI/CD)

Implement CI/CD pipelines to automate the build, testing, and deployment processes. This ensures that updates and improvements can be seamlessly rolled out, enhancing the efficiency of your development workflow.

Conclusion on Publishing and Deployment in FlutterFlow

Publishing and deploying an app can be a complex task, but FlutterFlow’s features simplify the process, allowing developers to focus on creating exceptional user experiences. Whether you’re targeting mobile devices or the web, FlutterFlow’s integration with Firebase and streamlined deployment process ensures that your app reaches its audience effectively. As you navigate the waters of publishing and deployment in FlutterFlow, you’ll find a powerful set of tools at your disposal, empowering you to bring your app to the world with confidence.

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Efficient Widget Structure to Optimize Performance

FlutterFlow operates on the Flutter framework’s widget system, and crafting an efficient widget structure is fundamental to performance optimization. Minimize the use of unnecessary widgets and hierarchies, ensuring that each widget serves a specific and essential purpose.

Lazy Loading and Code Splitting

Implement lazy loading and code splitting to load resources and components only when they are needed. This strategy reduces the initial load time of the app and enhances the user experience, particularly in scenarios where large assets or complex features are involved.

Optimized Image Assets

Images can significantly impact an app’s performance. Compress and optimize image assets to reduce their file sizes without compromising quality. FlutterFlow allows for easy integration of optimized images, ensuring faster loading times and smoother image rendering.

Network Request Optimization

Streamline network requests by minimizing unnecessary calls and optimizing data transfer. Implement caching mechanisms to store frequently accessed data locally, reducing the need for repeated network requests. This not only improves performance but also conserves bandwidth.

State Management Best Practices to Optimize Performance

Choose an appropriate state management approach based on the complexity of your app. FlutterFlow supports various state management solutions, including provider and Riverpod. Opt for a solution that aligns with your app’s architecture and minimizes unnecessary re-renders.

Profiler Utilization

Leverage Flutter’s built-in profiler tools to identify performance bottlenecks. The FlutterFlow platform seamlessly integrates with these tools, allowing developers to analyze and optimize the app’s performance in real-time.

App Threading and Isolates

Make use of Dart isolates to perform CPU-intensive tasks in the background, preventing UI thread congestion. This ensures that the app remains responsive and delivers a smooth user experience even when handling computationally intensive operations.

App Size Reduction to Optimize Performance

Minimize the app’s size by removing unused dependencies and assets. FlutterFlow provides features for managing dependencies and assets efficiently, enabling developers to create leaner applications that load faster and consume less storage space.

Conclusion: Optimize Perfomance in FlutterFlow Apps

Optimizing performance is a continuous journey in the world of mobile app development, and FlutterFlow equips developers with the tools needed to embark on this journey seamlessly. By implementing efficient widget structures, leveraging lazy loading, optimizing images, streamlining network requests, and adopting best practices in state management, developers can create FlutterFlow apps that not only look great but also deliver an exceptional and responsive user experience. As technology evolves, FlutterFlow remains at the forefront, empowering developers to build high-performance apps that stand out in today’s competitive app market.

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User authentication involves verifying the identity of users before granting them access to an application. FlutterFlow provides developers with a set of tools to implement secure authentication processes seamlessly.

Key Features of User Authentication in FlutterFlow

Email and Password Authentication

FlutterFlow supports traditional email and password authentication, allowing users to register and log in using their email addresses and secure passwords. This method is fundamental for most applications and provides a straightforward way to manage user accounts.

Social Media User Authentication

Enhance user experience by enabling social media authentication. FlutterFlow supports authentication through popular platforms like Google, Facebook, and Twitter. This not only simplifies the login process for users but also enhances the reach of your app.

Multi-Factor Authentication (MFA)

Strengthen security measures by implementing multi-factor authentication. FlutterFlow supports MFA, adding an extra layer of protection through methods such as SMS verification codes or authentication apps. This is especially crucial for apps dealing with sensitive information.

User Profile Management

FlutterFlow allows developers to manage user profiles efficiently. Capture and store user information securely, and enable users to update their profiles within the app. This feature enhances personalization and engagement.

Implementing User Authentication in FlutterFlow

Setting Up Authentication Providers

Begin by configuring authentication providers in your FlutterFlow project. This involves specifying which authentication methods your app will support, such as email/password, Google, or Facebook.

Integration with Firebase

FlutterFlow seamlessly integrates with Firebase Authentication, a powerful and scalable authentication solution. Utilize Firebase to handle sign-up, login, password reset, and other authentication-related functionalities.

Customizing User Authentication Workflows

Tailor authentication workflows to suit your app’s specific requirements. Customize user registration forms, login screens, and password recovery processes to align with your app’s design and user experience goals.

Error Handling and User Feedback

Implement robust error handling to provide users with meaningful feedback during the authentication process. Clearly communicate any registration or login issues and guide users on resolving them.

Conclusion

Authentication is a pivotal component of app development, and FlutterFlow simplifies the implementation of secure and user-friendly authentication processes. By leveraging its features for email/password authentication, social media integration, multi-factor authentication, and profile management, developers can create apps that prioritize both security and user experience. As FlutterFlow continues to evolve, it remains a valuable tool for crafting seamless and secure authentication experiences in Flutter applications.

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Understanding Responsive Design: Responsive design is a design approach that ensures a web or mobile application adapts to different devices and screen sizes. In the context of FlutterFlow, responsive design means crafting layouts and interfaces that dynamically adjust based on the device’s specifications, be it a smartphone, tablet, or desktop.

Key Components of Responsive Design in FlutterFlow

Layouts and Constraints

FlutterFlow provides a flexible layout system that allows developers to create responsive designs with ease. By leveraging constraints, developers can define how widgets behave when the screen size changes. This ensures that the UI components adapt fluidly to varying dimensions, providing a consistent user experience.

Media Queries

FlutterFlow incorporates media queries, a powerful tool commonly used in web development. Media queries enable developers to apply specific styles or layouts based on the characteristics of the device, such as screen width or height. This allows for the customization of the app’s appearance on different devices, ensuring optimal usability.

Widget Flexibility

Widgets are the building blocks of FlutterFlow applications, and their flexibility is key to achieving responsive designs. FlutterFlow offers a rich set of widgets that can automatically adjust their size and layout based on the available screen real estate. This adaptability is crucial for creating visually pleasing interfaces across a variety of devices.

Orientation Handling

FlutterFlow supports the dynamic handling of device orientations. Developers can specify different layouts for portrait and landscape modes, ensuring a seamless transition between the two. This capability is particularly important for apps that need to provide a consistent and engaging user experience regardless of how users hold their devices.

Best Practices for Responsive Design in FlutterFlow

Use Flexible and Expanded Widgets

Leverage FlutterFlow’s flexible and expanded widgets to create layouts that adjust proportionally to the available space. This ensures that UI elements scale gracefully on different devices.

Test Responsive Design Across Devices

Regularly test your app on various devices to ensure a consistent and polished user experience. FlutterFlow’s live preview feature allows developers to see real-time changes across different screen sizes during the development process.

Prioritize Content Accessibility

Responsive design is not just about adapting to different screen sizes but also about making content accessible. Ensure that text, images, and interactive elements remain clear and usable across devices.

Optimize Responsive Design Performance

Consider the performance implications of your design choices. Optimize assets and animations for different screen sizes to ensure a smooth and responsive user interface.

Conclusion

Responsive design in FlutterFlow empowers developers to create apps that seamlessly adapt to the diverse array of devices in the digital landscape. By embracing the platform’s robust layout system, media queries, and widget flexibility, developers can craft user interfaces that not only look visually appealing but also provide an optimal user experience on smartphones, tablets, and desktops. As the demand for cross-platform and responsive applications continues to grow, FlutterFlow stands out as a valuable tool for developers aiming to deliver exceptional user experiences across the entire spectrum of devices.

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1. Understanding the Need for Custom Code 

While FlutterFlow simplifies app development, there may be scenarios where custom code becomes invaluable:

• Complex Logic: For intricate business logic or specialized functionalities not covered by visual components.
• Integration with External Services: When you need to connect your app with APIs, third-party libraries, or services not directly supported by FlutterFlow.

2. Integrating Custom Code into FlutterFlow Projects

Here’s how you can seamlessly blend custom code into your FlutterFlow project:

• Create a Custom Code Component: In the FlutterFlow editor, use the “Add” menu to add a “Custom Code” component to your page.
• Insert Your Code: The custom code component provides a dedicated space to insert your HTML, CSS, or JavaScript code. Leverage this space for your custom logic or external integrations.

3. Enhancing User Interface with Custom Styling

Custom code empowers you to refine your app’s appearance beyond the capabilities of the visual editor:

• CSS Styling: Implement custom styles using CSS to achieve unique design elements not covered by standard FlutterFlow components.
• Responsive Design Tweaks: Fine-tune responsiveness and layout adjustments with custom CSS for a pixel-perfect user experience.

4. Integrating External APIs and Libraries

Extend your app’s functionality by seamlessly integrating external APIs and libraries:

• HTTP Requests: Use custom code to make HTTP requests to external APIs, fetching and displaying real-time data in your FlutterFlow app.
• External Libraries: Incorporate third-party JavaScript libraries for specialized features or visualizations, expanding the scope of your app.

5. Implementing Custom Animations

Elevate the user experience by introducing custom animations not covered by standard FlutterFlow components:

• JavaScript Animations: Utilize custom JavaScript animations to add flair and interactivity to your app, creating a dynamic and engaging user interface.
• Timeline Animations: Implement timeline-based animations using custom code for precise control over the animation sequence.

6. Tips for Efficient Custom Code Usage

To make the most of custom code in FlutterFlow:

• Regular Testing: Test your custom code snippets frequently to catch any issues and ensure compatibility.
• Documentation: Keep clear documentation for custom code segments, making it easier for your team or collaborators to understand and maintain.

7. Embracing the Power of Hybrid Development

FlutterFlow’s support for custom code opens the door to hybrid development:

• Combine Visual and Code Components: Leverage the best of both worlds by seamlessly integrating visual components with custom code to achieve unparalleled versatility.
• Flexibility and Scalability: As your app grows, custom code ensures scalability and adaptability to evolving project requirements.

Conclusion

Working with custom code in FlutterFlow transforms your development experience, offering endless possibilities for creativity and functionality. Whether you’re enhancing the user interface, integrating external services, or implementing custom animations, the fusion of visual development and code empowers you to create truly exceptional apps. Dive into the world of custom code in FlutterFlow and unlock the full potential of your app development journey.

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1. Embrace Consistency in Design Elements in FlutterFlow

Consistency is key to a polished and professional-looking app. Ensure consistency across your app by:

• Color Palette: Choose a harmonious color palette that aligns with your brand or theme. FlutterFlow allows you to define global colors for easy management.
• Typography: Opt for a readable and visually appealing font. Maintain consistency in font sizes and styles throughout your app.
• Button Styles: Use consistent button styles for primary and secondary actions. This helps users easily understand the hierarchy of actions within your app.

2. Leverage Whitespace Effectively

Whitespace, or negative space, is a powerful design element that contributes to a clean and organized layout. Consider the following:

• Margins and Padding: Ensure proper margins and padding around elements for a well-balanced design. FlutterFlow’s visual editor makes it easy to adjust spacing.
• Grouping and Alignment: Group related elements together and align them logically. This enhances readability and comprehension.

3. Prioritize User Navigation and Flow

A seamless user experience is essential for the success of your app. Pay attention to:

• Navigation Bar: Design an intuitive navigation bar that provides easy access to essential sections of your app. Consider using FlutterFlow’s navigation components for quick implementation.
• Flow between Screens: Ensure a smooth flow between different screens or pages. Use consistent navigation patterns to guide users through your app effortlessly.

4. Optimize Images and Media

Visual assets play a significant role in app design. Optimize images and media elements by:

• Image Compression: Compress images to reduce file sizes without compromising quality. This ensures faster load times for your app.
• Iconography: Use clear and recognizable icons to convey actions or information. FlutterFlow offers a variety of built-in icons for convenience.

5. Emphasize Responsive Design in FlutterFlow

FlutterFlow allows you to create responsive designs that adapt to various screen sizes. Ensure your app looks great on both small and large screens by:

• Flexible Layouts: Use flexible layouts that adjust dynamically to different screen dimensions.
• Test on Multiple Devices: Test your app on various devices and screen orientations to identify and address layout issues.

6. Implement Microinteractions

Microinteractions are subtle animations or visual feedback that enhance the user experience. Consider:

• Button Animations: Add subtle animations to buttons or interactive elements to provide feedback when tapped.
• Page Transitions: Use smooth transitions between pages to create a cohesive and engaging user experience.

7. Seek Inspiration and Iterate

Stay inspired and continually refine your designs. Explore design trends, study successful apps, and don’t be afraid to iterate based on user feedback. FlutterFlow’s visual editor facilitates quick design iterations.

Conclusion: Design Tips for FlutterFlow

Designing a visually stunning app with FlutterFlow is a creative and rewarding process. By embracing consistency, effective use of whitespace, prioritizing user navigation, optimizing media, emphasizing responsiveness, incorporating microinteractions, and seeking inspiration, you’ll be well on your way to crafting an app that not only looks great but also provides an exceptional user experience.

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What is BDD or Behavior Driven Development?

BDD is a work methodology for software teams that closes the gap between those working on the business side of a project and those on the technical side. This is achieved by:

• Encouraging collaboration across roles to build a shared understanding of the problem to be solved
• Working in rapid and small iterations to increase feedback and the value flow
• Producing system documentation that is automatically checked against the system’s behavior

All of this is done by focusing collaborative work around concrete, real-world examples that illustrate how we want the system to behave. Those examples guide developers from concept through to implementation in a process of continuous collaboration.

Why Use Flutter with BDD

We thought Teresa Wu made a perfect point in her Mobile London talk on How to implement BDD in a Flutter project, so we’ll let her speak for us as to why or when to use BDD:

“Given the mission to get things done right and in time

And mitigate creating tech debt for the future self 

When working with the new project

Then we use BDD”

BDD and agile

If your team is using agile methodologies already, it can aid you in planning your work in small increments of value like user stories. Keep in mind that BDD doesn’t replace your existing agile process, it just enhances it.

BDD could be compared to a set of plugins for your existing process that will help your team be more capable to deliver on the promises of agile. In other words, BDD will help your team produce timely, reliable releases of working software that meet your organization’s requirements.

Flutter with BDD

Building our first Flutter App with BDD

Let’s start by building our very first Flutter App using BDD. 

We’ll assume that you have your development environment working and that you are able to see the start template app. We’ll be using the web stable version of Flutter.  

As we are using BDD, we’ll be focusing on the sometimes regrettably ignored test folder. Files in this folder start compiling just fine, but as the project grows, most developers break its files and end up deleting one or more files, or even the entire folder. 

This has a logical explanation. Writing tests is not an easy task; you need to spend time learning what unit, widget and integration tests are and how they work before you can write useful tests.

But, in this article, we will keep things simple following the methodology of KISS software development. 

Write features 

We’ll write our test in a natural language by creating a *.feature file inside the test folder. Let’s say you’re testing the default Flutter counter app, then the content might be:

Link: script

Add the dependency

To make a widget test with this file, we’ll install the dependencies:

<code>
dev_dependencies:
build_runner:
bdd_widget_test: <put the latest version here>
...
</code>

Generate the test files

Now, ask built_value to generate Dart test files for you. You can do this with the following command:

<code>
flutter packages pub run build_runner watch --delete-conflicting-outputs
</code>

Run tests

Now, it’s time to run the test. You can do it from your IDE or by running the following:

<code>
flutter test
</code>

All tests have passed, congrats! You can now push your changes. 

Let’s add a more complex test to test the current project template’s functionality.

Link: script

When you save your changes on the .feature file, the test file in Dart will be updated with the content of the new test. Go ahead and run it.

Green status again! Go ahead and push it.

Now, let’s make use of the BDD circle and add a test for a new functionality we will implement. 

Let’s say we want a button that, when pressed, decreases the counter. 

Go ahead and write the scenario:

Link: script

Now, if you check the Dart file, it should have the new test for the given scenarios. 

Try to run them, just to see them fail. We are in the red status of the BDD circle. Now, let’s add the functionality. 

Try replacing your current Action button with a stack of two buttons:

Link: script

You can write the _decrementCounter function on your own so that if you run your test, it passes.

Final thoughts on Flutter with BDD 

Congrats! You are on your way to following the BDD process in Flutter development! 

Here is the entire code for you to check out. 

Keep it flowing and don’t forget, “Every large system that works started as a small system that worked.”

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In this article, we’ll go over all you need to know about FlutterFlow, including exactly what it is, its features, benefits and pricing. But, to give you some context, we’ll start with an overview of our beloved Flutter.

What is Flutter?

As stated on its website, Google Flutter is “Google’s UI toolkit for building beautiful, natively-compiled applications for mobile, web, and desktop from a single codebase”. The fact that it is a complete SDK means it provides users with everything they need to create cross-platform apps, such as ready-made widgets, a rendering engine, and testing and integration APIs.

Google Flutter works with existing code, is used by developers and organizations around the globe, and is free and open-source. Some of the development companies currently using Flutter include eBay, the Alibaba Group and BMW. Consequently, it is also one of the top preferred skills among software engineers. Google has used Flutter to work on Google Ads and smart displays like Google Home Hub.

If you want to know more, you can take a look at our Google Flutter Review 2021.

What is FlutterFlow?

FlutterFlow was founded by two former Google engineers as a third-party visual app builder for the Flutter framework. It is backed by Y Combinator and was featured at Google I/O.

As we’ve mentioned, FlutterFlow is a browser-based drag-and-drop interface to build mobile apps. This means you can create incredible custom apps in less than an hour without the need to write any code. Think of it as the Wix or GoDaddy of mobile apps.

The interface is already in its 2.0 version, which was released in early October. There’s not much more we can say without giving its features away, so let’s get to it!

Features

• Build an app without writing any code

This might seem pretty obvious, but it’s definitely the most attractive feature FlutterFlow has to offer.

• Development for both iOS and Android

Not only can you create an app without writing the code, you can do so for both iOS and Android at the same time.

• UI templates and components

There are over 50 screen templates, over 40 pre-built widgets and several third-party integrations to choose from (such as Braintree and Google AdMob) that will save you a considerable amount of time.

• Set up and add live data to your app

Firebase makes it easy for you to set up data infrastructure and connect to live data.

• User authentication

User authentication can be done quite simply by integrating Firebase and Google and Facebook logins just by dragging a button.

• GitHub configuration

GitHub integration means that you can link your project to a GitHub repository so you can push the code to your repo anytime you want.

• Download source code

The work is all yours; you can easily download the clean and easy-to-read source code for your mobile app.

• Guided troubleshooting

You can easily avoid and fix potential issues through real-time feedback and error correction.

Pricing

FlutterFlow offers three different plans depending on your budget and your needs. Let’s take a look at them:

1. Free plan

The free plan allows you to build, preview and run mobile apps. It includes a UI builder with pre-built widgets, Firebase integration, third-party integrations, screen templates, run mode, team collaboration and custom functions.

2. Standard Plan

The standard FlutterFlow plan includes all the features from the free plan plus sample apps, the option to build and download an APK and the option to download the code from the mobile apps you build. This plan costs $30/month.

3. Pro Plan

The pro plan includes all of the above as well as custom APIs, GitHub and Codemagic integration and the Firebase Content Manager. This plan costs $70/month.

Both paid options also include a free trial to make sure they are the right fit for your project.

Resources

If you want to learn more about FlutterFlow, there are various comprehensive resources available. You can take a look at the official documentation here. You can also make the most of the FlutterMet sample app and subscribe to the FlutterFlow YouTube channel.

Final thoughts on FlutterFlow

FlutterFlow definitely looks like a smart option for projects with a restricted timeline and budget. We hope this article has helped you learn all you need to know about FlutterFlow. What do you think? Are you ready to try it? 

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Flutter Code Review

Released in 2017, Flutter is Google’s toolkit for the development of native mobile, web, and desktop apps. The goal behind Flutter is to give developers an ideal cross-platform development framework. Flutter is actually an SDK, which means it provides users with everything they need to create cross-platform apps, such as ready-made widgets, a rendering engine, and testing and integration APIs.

Some of its features include hot reload, reduced code, and customized widgets. Moreover, Flutter uses Dart, a modern alternative to JavaScript developed by Google, as a programming language. The framework is not only easy to learn, but is also known for increasing productivity and having extensive documentation.

Flutter is also one of the top preferred skills among software engineers which is why today we are focusing on Flutter code review. If you want to know more, you can check out our detailed Flutter review here.

1. Naming conventions

Although saying you need to make sure Flutter naming conventions are followed may sound obvious, the truth is that these are often overlooked. The main advantage of naming conventions is that they make your code more readable. As a matter of fact, the few minutes you might spend reading the code style guides will save you a lot of time and hassle in the future and is an essential part of the Flutter code review. You can find all you need to know about naming conventions to apply to your review here.

2. Folder structure

When carrying out your Flutter code review, you should also make sure you are segregating your code into the proper folder structures, namely providers, models, screens/pages, utils, etc.

3. Clean and reusable code

You should also ensure that your code is properly formatted, that you add the necessary comments for documentation, remove unused or commented code, and make code and widgets reusable where possible. These are all things to keep in mind when reviewing the code.

4. Widget structure and usage

When it comes to widgets during your Flutter code review, you should keep in mind that it is not only possible, but advisable that you split widgets into sub widgets. Moreover, when dealing with a very long list, you should use ListView.builder to improve performance. It is also advisable to use const in widgets for the same reason (you can cache parts of the widget tree to prevent unnecessary rebuilds using Dart const constructors for parts of the child tree).

5. Building method structure

Another important point is to make sure the build method is pure. Remember that side effects can be triggered by external factors such as route pop/push, screen resize or a parent widget recreating its child. While carrying out your Flutter code review, you should make sure the build method does not include any logic that may trigger an HTTP call or modify any state.

6. Package structure

When it comes to package structure, you should keep in mind that you need only a single import that reexports all of the package’s API. Also, Flutter packages shouldn’t have private APIs (except for those prefixed with underscores) and every file in the package should be exported.

7. Use Dart code metrics

Dart code metrics is a great way to improve quality during your Flutter code review. This static code analysis tool helps you monitor and improve the quality of the code. Some of the metrics you can take a look at include lines of executable code, number of parameters, maximum nesting and cyclomatic complexity. In addition to metrics, the analysis tool also includes linting, i.e. automatic checking of code. This makes Dart code metrics a great friend as far as your Flutter code review goes. You can take a look at the tool’s capabilities in more detail here.

Final thoughts on Flutter code review

We hope this article has given you some useful tips when it comes to the best practices for Flutter code review. Be sure to check out the Flutter and Dart’s style guides for further info.

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Flutter’s web support has brought about innovations and makes highly sophisticated apps with hardware-accelerated 2D and 3D graphics and flexible layout and paint APIs possible. It offers an app-centric framework that takes full advantage of everything the modern web has to offer.

Moreover, Flutter makes it easier to build responsive screens that adapt to different devices and appropriately fit users’ screens, all in one code base.

The Flutter UI toolkit is specially useful on three particular app scenarios:

• Progressive web apps (PWAs) that combine the web’s reach along with the capabilities of a desktop app.
• Single page apps (SPAs) that load once and transmit data to and from internet services.
• Existing Flutter mobile apps that are being migrated to the web, enabling shared code for both experiences.

Here you can check Flutter’s power on the web. 

But, most valuable of all, is that this power comes with less weight and, therefore, with, native performance. This is a major plus since native performance leads to better user experience and we know for a fact this correlates with user retention. 

Flutter Create 

Flutter Create is an annual contest that challenges developers to build interesting, inspiring, and beautiful apps with Flutter using 5kB or less of Dart code.

Just to put things into perspective,  5kB is equivalent to:

• Less than half a second of your average music file. A MP3 file is usually encoded at 128kbps (kilobits/sec). That’s 128/8 = 16 kilobytes/second. So 5kB is 0.3125s of a typical MP3 file.

• Less than 0.05% of the size of the HTML specification. Less than 5% of the size of the HTML specification’s table of contents, even.

• The size of an 80×60 original image encoded in GIF format.

But, what can be built within this size restriction? Can something beautiful be so small? Check out this video and prepare to be surprised. 

Isn’t it amazing? We find it impressive for sure. 

The winners: best Flutter apps

The 2020 winners have not been announced yet and we are looking forward to seeing what the community builds!

Meanwhile, let’s take a look at the 2019 winners: 

Grand Prize Winner: Compass by Zebiao Hu

This Flutter app uses the magnetometer, accelerometer, location sensors in order to get a user’s current direction, location, weather, temperature, humidity, etc. When you scroll up, it shows a globe that users can rotate to get real-time weather data.

Visual Beauty Winner: Relax by Erin Morrissey

This meditation app displays rain, forests, sunsets, and oceans with their corresponding sounds. Users can choose between four nature sounds and it alternates through related images while the sounds are playing.

Code Quality Winner: Pocket Piano by Rody Davis

This is a piano built for Web, iOS and Android. Pocket Piano gives you the option to change the octave (by sliding to the left or right), as well as the key width. You can also toggle labels on the keys and play any note (or notes) by tapping. The piano also fully supports semantics for screen reader users. Here is the repo. 

Overall Execution Winner: TimeFlow by Fabian Stein

Timeflow is a timer that displays a sphere that shatters into pieces and slowly reassembles in one, two, or three minutes, as selected (you can see the reassembly in the video above). 

Other Submissions

Judging is no easy task, here we’ll list our top 5 apps. You can find all submissions here.

Shooter Game

This simple shooter game was created using Flutter and Flare with no game engine whatsoever.

Elements-App

Elements lets you browse the elements of the periodic table!

This Flutter app was developed specially for the Flutter Create 2019 contest. In addition to showing you the various elements, it also includes helpful snippets of information about each one.

Elements is a cross-platform app that can run both on Android and iOS.

Lifenticon

Lifention is a combination of Game of Life and Identicon.

This app lets you assess how your name would do in Conway’s Game of Life by turning it into an Identicon—that is, a visual representation of a hash value—and using it as the seed of the system.

Flutter memory game

Memory is based on the classic card game. It starts by showing all the cards face down. Two cards are then flipped over each turn. The object of the game is, of course, to turn over pairs of matching cards.

Memory has been tested on both simulated and physical Android devices as well as simulated iOS devices.

FidgetDice

FidgetDice is an App that acts as a fidget-cube.

Final thoughts on best Flutter apps under 5kB of Dart Code

As you can see, beautiful things can be built with Flutter, even with a restrictive size limitation. We can’t wait to see the 2020 contest results! 

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