Best Supernova Alternatives: Video-to-React Native, Swift Code Conversion With AI in 2026

TL;DR: Supernova’s sunset leaves a gap in design-to-code workflows, but Replay offers a powerful alternative by reconstructing working React Native and Swift code directly from video, understanding user behavior, and integrating seamlessly with your existing stack.

The design-to-code landscape is shifting. With Supernova no longer in the picture, teams are scrambling to find robust solutions that bridge the gap between design intent and functional code. While screenshot-to-code tools offer a partial solution, they often miss the crucial element: user behavior. In 2026, the expectation is for AI to understand how users interact with a design, not just what the design looks like. This is where video-to-code conversion shines, and Replay leads the charge.

The Limitations of Screenshot-to-Code and Why Video Matters#

Screenshot-to-code tools have their place, but they are fundamentally limited. They analyze static images, unable to capture the dynamic interactions and user flows that define a real-world application. This results in code that often requires significant manual tweaking to achieve the desired behavior.

Consider a simple animation triggered by a button press. A screenshot-to-code tool can capture the initial and final states of the animation, but it cannot infer the trigger or the transition itself. This is where Replay's video-to-code approach becomes invaluable. By analyzing video, Replay understands the sequence of events, the user's intent, and the context surrounding each interaction.

Replay: Behavior-Driven Reconstruction with Gemini#

Replay leverages the power of Gemini to analyze video recordings of user interfaces and reconstruct fully functional React Native and Swift code. This "Behavior-Driven Reconstruction" approach treats the video as the source of truth, ensuring that the generated code accurately reflects the intended user experience.

Key Features That Set Replay Apart#

• •Video Input: Replay analyzes video recordings, capturing dynamic interactions and user flows.
• •Multi-Page Generation: Reconstruct entire applications with multiple screens and complex navigation patterns.
• •Supabase Integration: Seamlessly integrate with your existing Supabase backend for data persistence and authentication.
• •Style Injection: Customize the look and feel of your application with CSS-in-JS or traditional stylesheets.
• •Product Flow Maps: Visualize the user journey and identify potential bottlenecks in your application.

Replay vs. Traditional Design-to-Code Tools#

Here's a comparison of Replay against traditional design-to-code tools and screenshot-to-code solutions:

Implementing Replay: A Step-by-Step Guide#

Let's walk through a practical example of using Replay to generate React Native code from a video recording.

Step 1: Capture the Video#

Record a video of your desired user interface in action. Ensure that the video clearly demonstrates the intended user flows and interactions. Use a screen recording tool that captures mouse clicks, taps, and keyboard inputs.

💡 Pro Tip: Speak clearly while recording to help Replay understand the purpose of each interaction.

Step 2: Upload to Replay#

Upload the video to the Replay platform. Replay will automatically analyze the video and begin reconstructing the user interface.

Step 3: Review and Refine#

Once the reconstruction is complete, review the generated code. Replay provides a visual interface for inspecting the code and making necessary adjustments.

Step 4: Integrate with Your Project#

Download the generated React Native code and integrate it into your existing project. Replay supports various integration options, including direct export to your IDE or version control system.

Code Example: Handling Button Press Events#

Replay intelligently generates event handlers based on observed user behavior. For instance, if a button press triggers a navigation event, Replay will generate the corresponding code:

typescript
// Example: Handling a button press event in React Native
import React from 'react';
import { Button, Alert } from 'react-native';

const MyComponent = () => {
  const handleButtonPress = () => {
    Alert.alert('Button Pressed!', 'Navigating to next screen...');
    // Navigation logic here (e.g., using React Navigation)
  };

  return (
    <Button
      title="Press Me"
      onPress={handleButtonPress}
    />
  );
};

export default MyComponent;

This code snippet demonstrates how Replay can automatically generate the

handler for a button, including the logic to display an alert and navigate to the next screen. The specific navigation logic will depend on your chosen navigation library (e.g., React Navigation).

Style Injection for Customized Look and Feel#

Replay also allows you to inject custom styles into the generated code. This enables you to tailor the look and feel of your application to match your brand guidelines.

javascript
//Example: Injecting custom styles using CSS-in-JS
import styled from 'styled-components/native';

const StyledButton = styled.TouchableOpacity`
  background-color: #007AFF;
  padding: 10px 20px;
  border-radius: 5px;
`;

const ButtonText = styled.Text`
  color: white;
  font-size: 16px;
`;

//Use StyledButton and ButtonText components in your React Native component

📝 Note: Replay supports various CSS-in-JS libraries, including styled-components, Emotion, and JSS.

The Future of Design-to-Code is Video-Driven#

As AI technology continues to evolve, video-to-code conversion will become increasingly prevalent. Replay is at the forefront of this revolution, empowering developers to build applications faster and more efficiently. By understanding user behavior and generating code that accurately reflects the intended user experience, Replay bridges the gap between design and development like never before.

⚠️ Warning: While Replay automates a significant portion of the code generation process, it's crucial to review and test the generated code thoroughly to ensure it meets your specific requirements.

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free trial with limited features. Paid plans are available for more advanced functionality and higher usage limits. Check the Replay website for the most up-to-date pricing information.

How is Replay different from v0.dev?#

While both Replay and v0.dev aim to streamline the design-to-code process, they differ significantly in their approach. v0.dev primarily focuses on generating code from text prompts and design specifications, whereas Replay analyzes video recordings to understand user behavior and reconstruct the user interface accordingly. Replay's video-driven approach allows it to capture dynamic interactions and user flows that are often missed by text-based tools.

What types of applications can I build with Replay?#

Replay is suitable for building a wide range of applications, including mobile apps, web applications, and desktop applications. The generated code can be easily integrated with various frameworks and libraries, such as React Native, Swift, React, and Angular.

What level of coding knowledge is required to use Replay effectively?#

While Replay automates much of the code generation process, a basic understanding of programming concepts and the target platform (e.g., React Native, Swift) is recommended. This will enable you to review and refine the generated code, as well as integrate it seamlessly into your existing project.

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Ready to try behavior-driven code generation? Get started with Replay - transform any video into working code in seconds.