How to convert a Flutter UI video to a complete Dart app with Replay AI: in 2026?

TL;DR: Replay AI leverages video analysis to reconstruct Flutter UIs into complete Dart apps, going beyond simple screenshot-to-code conversion by understanding user behavior and intent.

The promise of AI-powered code generation has been around for years, but most tools still fall short. They treat UI creation as a purely visual exercise, missing the critical element: user interaction. Static screenshots simply can't capture the how and why behind a user's actions. This is where video-to-code engines like Replay are changing the game. Instead of guessing from flat images, Replay analyzes video recordings to understand user behavior and reconstruct working UI components.

Understanding Behavior-Driven Reconstruction#

Traditional screenshot-to-code tools are limited by their input. They can only interpret what they see, leading to brittle code that doesn't accurately reflect the intended user experience. Replay, on the other hand, uses "Behavior-Driven Reconstruction." This means the video itself becomes the source of truth. By analyzing user interactions (taps, swipes, form entries), Replay understands the intent behind the UI and generates code that accurately reflects that behavior.

Consider a simple example: a user tapping a button on a screen recording. A screenshot-to-code tool might identify the button and its visual properties, but it wouldn't understand why the user tapped it. Replay, however, analyzes the context of the tap – what happened before, what happened after – to infer the button's function and generate the appropriate code.

Converting a Flutter UI Video to a Dart App: A Step-by-Step Guide#

Let's walk through the process of converting a Flutter UI video into a complete Dart app using Replay. While I can't execute the process directly here, I can provide a detailed guide on how it would work using Replay's capabilities.

Step 1: Capture the UI Video#

The first step is to record a video of the Flutter UI you want to reconstruct. Ensure the video clearly demonstrates all user interactions and product flows. A high-quality, stable video is crucial for accurate analysis.

💡 Pro Tip: Use a screen recording tool with clear audio. While Replay primarily analyzes visual data, audio cues can sometimes provide additional context.

Step 2: Upload the Video to Replay#

Upload the video to the Replay platform. Replay supports various video formats and resolutions.

Step 3: Replay Analyzes the Video#

Replay's AI engine analyzes the video, identifying UI elements, user interactions, and overall product flow. This process leverages Gemini's capabilities for advanced video understanding.

📝 Note: The analysis time depends on the video length and complexity of the UI.

Step 4: Review and Refine the Generated Code#

Once the analysis is complete, Replay generates the Dart code for the Flutter app. Review the code and make any necessary refinements. Replay allows you to edit the generated code directly within the platform.

dart
// Example of generated Dart code for a button
import 'package:flutter/material.dart';

class MyButton extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ElevatedButton(
      onPressed: () {
        // Handle button press logic here
        print('Button pressed!');
      },
      child: Text('Click Me'),
    );
  }
}

Step 5: Integrate with Supabase (Optional)#

If your Flutter app uses a backend, you can integrate Replay with Supabase. Replay can automatically generate the necessary Supabase client code and data models based on the video analysis.

Step 6: Inject Custom Styles (Optional)#

Replay allows you to inject custom styles into the generated code. This ensures the app matches your desired brand identity. You can define styles using CSS or Dart code.

Step 7: Generate Product Flow Maps#

Replay automatically generates product flow maps based on the video analysis. These maps provide a visual representation of the user's journey through the app.

⚠️ Warning: While Replay strives for accuracy, human review is always recommended, especially for complex UIs.

Key Features of Replay#

• •Multi-page generation: Reconstruct entire applications, not just single screens.
• •Supabase integration: Seamlessly connect your UI to a backend.
• •Style injection: Customize the look and feel of your app.
• •Product Flow maps: Visualize the user journey.
• •Behavior-Driven Reconstruction: Analyze video to understand user intent.

Replay vs. Traditional Screenshot-to-Code Tools#

Addressing Common Concerns#

• •Accuracy: Replay's accuracy depends on the quality of the video and the complexity of the UI. However, it generally outperforms screenshot-to-code tools due to its ability to analyze user behavior.
• •Complexity: Replay can handle complex UIs with multiple interactions and data dependencies. However, very intricate UIs may require more manual refinement.
• •Security: Replay prioritizes data security. All video uploads are encrypted and stored securely.

The Future of UI Development#

Replay represents a significant step forward in AI-powered UI development. By focusing on behavior and intent, it generates more accurate, functional, and maintainable code. As AI technology continues to evolve, video-to-code engines like Replay will become indispensable tools for developers of all skill levels.

typescript
// Example of generated Supabase client code
import { createClient } from '@supabase/supabase-js';

const supabaseUrl = 'YOUR_SUPABASE_URL';
const supabaseKey = 'YOUR_SUPABASE_ANON_KEY';
const supabase = createClient(supabaseUrl, supabaseKey);

const fetchData = async () => {
  const { data, error } = await supabase
    .from('your_table')
    .select('*');

  if (error) {
    console.error('Error fetching data:', error);
  } else {
    console.log('Data:', data);
  }
};

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free tier with limited functionality. Paid plans are available for more advanced features and higher usage limits. Check the Replay website for the latest pricing information.

How is Replay different from v0.dev?#

While both tools aim to accelerate UI development, Replay distinguishes itself through its video-to-code engine. V0.dev typically relies on text prompts and predefined components, whereas Replay analyzes real user behavior captured in video recordings, resulting in more accurate and context-aware code generation. Replay focuses on understanding user actions not just visual appearance.

Can Replay handle animations and transitions?#

Yes, Replay can analyze animations and transitions in the video and generate the corresponding code in Flutter. However, very complex animations may require manual adjustments.

What video formats does Replay support?#

Replay supports common video formats such as MP4, MOV, and AVI.

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