Privacy Policy

1. Introduction

Lingexa ("we", "us", or "our") operates the website and platform at lingexa.app (the "Service"). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our Service.

2. Information We Collect

Account Information

• Email address (required for account creation)
• Display name (optional)
• Profile information you choose to provide
• Authentication data via Google OAuth or email/password

Usage Data

• Writing submissions and AI-generated feedback
• Speaking recordings and transcriptions
• Exercise responses and scores
• Progress data, streaks, and XP
• Class bookings and attendance

Technical Data

• IP address and approximate location (country-level, for payment routing)
• Browser type, device information
• Pages visited and interaction patterns

Payment Information

We do not store credit card numbers. Payments are processed securely by Rebill. These processors handle your payment data under their own privacy policies.

3. How We Use Your Information

• Provide and improve the Service (AI feedback, progress tracking, class scheduling)
• Process payments and manage subscriptions
• Send transactional emails (booking confirmations, password resets)
• Analyze usage patterns to improve the platform
• Communicate important updates about the Service

We do not sell your personal data to third parties. We do not send marketing emails without your explicit consent.

4. Third-Party Services

We use the following third-party services that may process your data:

• Supabase — Authentication and database hosting
• OpenAI — AI-powered writing feedback and speaking scoring (your submissions are sent to OpenAI for processing)
• Rebill — Payment processing
• Vercel — Application hosting

Each of these services has their own privacy policy. We recommend reviewing them for details on how they handle your data.

5. AI-Processed Content

When you submit writing or speaking exercises, your content is sent to OpenAI for analysis and feedback. We do not use your submissions to train AI models. OpenAI processes this data under their API data usage policy, which states that API inputs are not used for model training.

6. Data Retention

We retain your data for as long as your account is active. If you delete your account, we will delete your personal data within 30 days, except where we are required to retain it for legal or regulatory purposes.

Speaking recordings are processed in real-time and are not stored on our servers after transcription is complete.

7. Your Rights

You have the right to:

• Access the personal data we hold about you
• Request correction of inaccurate data
• Request deletion of your account and data
• Export your data in a portable format
• Withdraw consent for optional data processing

To exercise any of these rights, contact us at hello@lingexa.com.

8. Cookies

We use essential cookies for authentication and session management. We do not use advertising or third-party tracking cookies. Analytics data is collected server-side without cookies.

9. Children's Privacy

Our Service is not directed to children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal data, please contact us.

10. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of material changes by posting the new policy on this page and updating the "Last updated" date.

11. Contact Us

If you have questions about this Privacy Policy, contact us at: hello@lingexa.com