Enhance your apps with ThinkUp: all you need to know about Flutter 

Google has introduced us to Flutter technology. This technology can be the solution for building high-performance and high-fidelity apps.  

What is Flutter? 

It is an open-source user interface (UI) and SDK (software development kit) cross-platform application, meaning that you can build apps for several platforms and operating systems: iOS, Android, web, Windows, MacOS, and Linux.  

Benefits of Using Flutter  

Sharing the code between mobile, web, and desktop apps: Reusing the code helps teams with no web development knowledge apply their mobile app development experience to write websites using code from the mobile product.  

– Wide customization options: You can customize the web app to maximize the user experience per each platform.  

– Enabling accessibility focus: Users increasingly expect web apps to be accessible. Flutter is excellent if you want pixel-perfect designs and components that create a great UI.  

Why should I use Flutter for my business? (Customer and supplier-developers’ perspective) 

Flutter is perfect for customers and engineers, let’s see why:  

For Clients:  

-Thanks to the hot reload functionality, you can see changes in code in real time without restarting  

– It is cost-effective because it allows developers to manage one codebase for iOS and Android platforms.  

– Creates beautiful IU and branded experiences because of the set of fully customizable widgets. We are designing native interfaces in minutes.  

For Developers:  

– With the one codebase, developers save time and ensure platform consistency.  

– With the rich set of functionalities, developers have the freedom to create a great UI with complex custom widgets.  

– A robust community that supports developers and helps them find help quickly.  

What is a flutter development process like? A simplified explanation of how a project is created. 

We know that sometimes making an initializer for Flutter Projects for the first time can be difficult; that’s why we will give you a simple guide explaining SOLID, Clean Architecture, specifications, CLI Tools, Project template, development, test, and rollout.  


Based on the abbreviation of the five main basic rules in object-oriented programming: Single responsibility, open-closed, Liskov substitution, interface segregation, and dependency inversion. All elements must have a single responsibility, comply with the hierarchy, and have separate interfaces without solid dependence on a particular implementation.  

Clean Architecture  

re of a project where software can be modified and upgraded while still being able to function. Combining these paradigms will avoid many mistakes while you’re still designing the solution.  


Also known as configurations, it is the place where you set custom parameters required for the project, and it could be done by filling out a file or in the process of interaction between CLI and a user. For example, Specifications Config <run> CLI tool <git> Project template.  

CLI tool  

This tool is automatically launched when a developer creates a project to gather the configurations in the repository on GitHub, the backbone responsible for generation.  

Project template 

Regarding architecture, we recommend starting with diagrams, which will illustrate links between classes and interfaces inside a piece of software. Also, we encourage using the legend. In that way, you identify and eliminate “red flags” by adding the elements of interaction from UML that you are using.  

It is essential to mention that to understand the processes going on inside your tool, you’ll need a Swimlane diagram. Swimlane diagrams are used in process diagrams to describe what happens throughout a specific part of a process and how it does that.  

A well-defined process divided into prods with all activities specified for every layer will help you see the path the algorithm “treads.”  


Let’s start with the first thing:  

-Config: It describes a new project that is being created. The user defines the values and parameters while interacting with the CLI.  

– ConfigBuilder: Based on a builder pattern, acts in a step-by-step manner and makes building objects easier, adding Config Parameters on  the way.  

– MinimalConfigBuilder: It implements the builder interface by overriding builder methods with one specific goal, to create a simple Config in the style of an MVP, using the baseline minimum of parameters.  

– Creator: This is the interface for Project creation, converting the project from an initial template arrangement into a specific one. It can implement various behavior scenarios while still preserving the standard interface, fulfilling the LSP (Liskov Substitution Principle) in SOLID and making it easier to handle the code base in the future.  

Job: This is used for the project generation process, where you can add series, creating a more complex structure. For example, you can adjust one of the tasks, move the executions around, or add a new thing without creating conflicts with the previous Jobs.  

Tests and rollout 

To test the tool, post it in pub. Dev, open the repository and distribute it to the entire department. Remember to write a guide and document the process: architecture, state management, and lint rules.   

Aspects to be considered at design level  

Flutter enables various customization options, allowing designers to create interactive and dynamic interfaces. The powerful SDK makes it the ideal choice for developing applications. Let’s see some features:  

– Impeller and Flame graphic engines: The framework is so robust that you can render in-app static and interactive 3D objects and other heavy graphics while working with native-like performance at 60-120 FPS.  

– In-app animations: Animations significantly impact the user experience, facilitating engagement at the end. With Skia and Impeller graphic engines, you can quickly implement interactive animations, ensuring no freezes, and with the hot reload feature we have mentioned before, you can test the animations in real-time.  

  • Material and Cupertino widgets: There are two options available. Material widgets are for all platforms; creating a MaterialApp design in Flutter will appear the same on all devices. However, the Cupertino widget would make it seem like an iOS app. With Cupertino widgets, you can run on Android and iOS; however, due to licensing concerns, Cupertino needs to have the correct typefaces on Android.  
  • Pixel-perfect rendering: With this feature, designers do not have to adjust the UI to the peculiarities of the SDK. The Flutter engine draws every pixel of the elements on the screen so the interface looks unified on all devices.  

Aspects to consider at the development level  

We already discussed the Flutter development process. Now, let’s briefly examine some requirements for building a Flutter app.  

– Flutter SDK: First, download the Flutter SDK from the official Flutter website and follow the installation instructions for your operating system.  

IDE: It is important to have an editor that offers Flutter and Dart support through various plugins and extensions. For example, we recommend Visual Studio Code (VS Code).  

– Run the command to verify Flutter setup: As easy as running this command 1. Flutter doctor to check if the project is set up correctly.  

How Do I Choose a Supplier for my Project?  

When choosing a provider for your project, it is important to make sure they have the necessary skills and experience to build the app according to your needs.  

Here are some aspects to consider:  

– Native mobile development capability: Experience makes the master. Choosing a supplier with more experience in native app development guarantees a great understanding of mobile environments and practices, finding solutions faster than developers without expertise.  

– Cross-Platform experience: Working with a supplier with experience developing for two platforms, iOS and Android, allows you to release your product for two platforms and have certainty that the developer is familiar with the differences and requirements on both platforms.  

Learning-oriented: Flutter is relatively new, dynamic, and constantly evolving. The key is having a supplier who follows the news and upgrades to know which solutions work best for specific use cases.  

It is essential to mention that choosing a good software development agency means choosing years of experience. This helps find solutions to any problems in the code cost-effectively and ensures an app follows best user experience practices. Check the portfolio with the completed projects and see if they fit your needs and objectives.  

Ready to leap?

Consider partnering with ThinkUp, an experienced fintech app development company that understands the intricacies of fintech mobile apps. Let us help you transform your business and stay competitive in today’s fast-paced.  



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