Replay AI for Building Fintech Apps: Secure UI Generation From UI Videos - 2026

TL;DR: Replay AI allows fintech developers to rapidly prototype secure and compliant UIs directly from screen recordings, significantly accelerating development cycles and reducing risk in a highly regulated industry.

The future of fintech app development isn't about meticulously crafting UIs pixel by pixel. It's about capturing user workflows, and letting AI generate the code. Screenshot-to-code is dead. The future is video.

The Fintech UI Bottleneck: Security, Compliance, and Speed#

Fintech companies face a unique set of challenges. UIs must be:

• •Secure: Vulnerabilities can lead to massive financial losses and reputational damage.
• •Compliant: Adhering to regulations like PCI DSS, GDPR, and KYC/AML is non-negotiable.
• •Fast to Market: Competition is fierce, and first-mover advantage is crucial.

Traditional UI development processes often fall short. Manual coding is slow, error-prone, and difficult to audit. Existing UI kits and component libraries offer limited flexibility and may not fully address specific security or compliance requirements. Low-code/no-code platforms can introduce their own set of security risks and vendor lock-in.

The problem? Fintech developers spend too much time wrestling with UI code, diverting resources from core business logic and innovation. This is where Replay comes in.

Replay: Behavior-Driven Reconstruction for Fintech UIs#

Replay is a video-to-code engine that uses Gemini to reconstruct working UI from screen recordings. Unlike screenshot-to-code tools that merely generate static layouts, Replay understands user behavior and intent. This "Behavior-Driven Reconstruction" approach offers several key advantages for fintech app development:

• •Rapid Prototyping: Capture a video of a desired user flow, and Replay generates the corresponding UI code in seconds.
• •Enhanced Security: Replay can be configured to automatically sanitize sensitive data fields (e.g., credit card numbers, account balances) during code generation.
• •Streamlined Compliance: The generated code is well-structured and easy to audit, simplifying compliance efforts.
• •Multi-Page Generation: Replay understands flows across multiple pages, creating complete user journeys.
• •Supabase Integration: Directly connect to your Supabase backend for seamless data integration.
• •Style Injection: Apply your existing design system or branding to the generated UI.
• •Product Flow Maps: Visualize the entire user flow to identify potential usability issues.

Replay vs. Traditional UI Development: A Head-to-Head Comparison#

Let's see how Replay stacks up against traditional methods and other code generation tools:

Building a Secure Fintech UI with Replay: A Step-by-Step Guide#

Let's walk through a practical example: generating a secure user onboarding flow for a mobile banking app.

Step 1: Capture the User Flow#

Record a video of a user completing the onboarding process: entering personal information, verifying their identity, and setting up their account. Be sure to simulate realistic user interactions, including potential errors or edge cases.

📝 Note: For sensitive information, consider using dummy data or masking techniques during the recording. Replay also offers built-in data sanitization options.

Step 2: Upload to Replay#

Upload the video to the Replay platform. Replay will analyze the video and generate the corresponding UI code.

Step 3: Review and Customize the Code#

Replay provides a clean, well-structured codebase. Review the generated code and make any necessary adjustments to ensure security and compliance.

typescript
// Example: Sanitizing a credit card number input field
const sanitizeCreditCard = (cardNumber: string): string => {
  // Replace all but the last four digits with asterisks
  const lastFour = cardNumber.slice(-4);
  const masked = '*'.repeat(cardNumber.length - 4) + lastFour;
  return masked;
};

// Usage in a React component
const CreditCardInput = () => {
  const [cardNumber, setCardNumber] = React.useState('');

  const handleChange = (event: React.ChangeEvent<HTMLInputElement>) => {
    const rawNumber = event.target.value;
    const sanitizedNumber = sanitizeCreditCard(rawNumber);
    setCardNumber(rawNumber); // Store the raw number for processing
    setSanitizedCardNumber(sanitizedNumber); // Display the sanitized number

  };

  return (
    <div>
      <label htmlFor="credit-card">Credit Card Number:</label>
      <input
        type="text"
        id="credit-card"
        value={cardNumber}
        onChange={handleChange}
      />
      <p>Sanitized: {sanitizedCardNumber}</p>
    </div>
  );
};

Step 4: Integrate with Supabase#

Connect Replay to your Supabase backend to seamlessly integrate the UI with your existing data layer. Replay supports automatic data binding and API call generation.

typescript
// Example: Fetching user data from Supabase
import { createClient } from '@supabase/supabase-js';

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

const fetchUserData = async (userId: string) => {
  const { data, error } = await supabase
    .from('users')
    .select('*')
    .eq('id', userId)
    .single();

  if (error) {
    console.error('Error fetching user data:', error);
    return null;
  }

  return data;
};

// Usage in a React component
const UserProfile = ({ userId }: { userId: string }) => {
  const [userData, setUserData] = React.useState(null);

  React.useEffect(() => {
    const fetchData = async () => {
      const data = await fetchUserData(userId);
      setUserData(data);
    };

    fetchData();
  }, [userId]);

  if (!userData) {
    return <p>Loading user data...</p>;
  }

  return (
    <div>
      <h2>User Profile</h2>
      <p>Name: {userData.name}</p>
      <p>Email: {userData.email}</p>
    </div>
  );
};

Step 5: Deploy and Monitor#

Deploy the generated UI to your production environment. Continuously monitor the UI for security vulnerabilities and compliance issues. Replay's audit logs provide a detailed history of all code generation and modification activities.

💡 Pro Tip: Implement automated testing and security scanning as part of your CI/CD pipeline.

The Future of Fintech UI Development#

Replay represents a paradigm shift in fintech UI development. By leveraging video as the source of truth and AI to generate code, developers can:

• •Reduce development time by up to 80%.
• •Improve UI security and compliance.
• •Focus on core business logic and innovation.
• •Rapidly iterate on UI designs based on user feedback.

The era of manual UI coding is coming to an end. The future is about capturing user behavior and letting AI handle the rest. Replay is leading the charge.

⚠️ Warning: While Replay significantly accelerates development, always review and test the generated code thoroughly to ensure security and compliance. AI is a tool, not a replacement for human expertise.

Frequently Asked Questions#

Is Replay free to use?#

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

How is Replay different from v0.dev?#

v0.dev and similar tools primarily rely on text prompts or design files as input. Replay analyzes video, which allows it to understand user behavior and intent, leading to more accurate and functional code generation. Replay's behavior-driven approach is particularly well-suited for complex fintech applications with intricate user flows.

What security measures does Replay have in place?#

Replay employs several security measures, including data encryption, access controls, and regular security audits. It also provides features for sanitizing sensitive data during code generation.

What frameworks and libraries does Replay support?#

Replay supports a wide range of popular frameworks and libraries, including React, Angular, Vue.js, and Next.js.

Can I use Replay for mobile app development?#

Yes, Replay can be used to generate UI code for both web and mobile applications.#

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