Privacy Policy

Last Updated: November 26, 2025

Welcome to RedPen. We are committed to protecting your privacy and ensuring the security of your personal information. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our mobile application and services.

1. Information We Collect

1.1 Personal Information

When you create an account with RedPen, we collect:

• Email address
• Name (if provided)
• Authentication credentials
• Profile preferences (language, theme settings)

1.2 Content You Upload

To provide our AI correction services, we process:

• Images of exams and exercises you upload
• PDF documents containing educational content
• Text extracted from your uploaded materials

1.3 Usage Information

We automatically collect certain information about your device and how you interact with RedPen:

• Device type and operating system
• App usage statistics
• Correction history and timestamps
• Credit usage and subscription information

2. How We Use Your Information

We use the collected information for the following purposes:

• Service Delivery: To provide AI-powered correction services for your exams and exercises
• Account Management: To create and manage your account, process subscriptions, and handle credits
• Personalization: To customize your experience based on your language and theme preferences
• Communication: To send you service-related notifications, updates, and respond to your inquiries
• Improvement: To analyze usage patterns and improve our AI models and services
• Security: To protect against fraud, unauthorized access, and ensure platform security

3. Data Processing and AI Services

4. Data Storage and Security

We take data security seriously:

• Your data is stored securely using Supabase infrastructure
• We use industry-standard encryption for data transmission
• Authentication is handled through secure Supabase Auth
• We implement access controls to protect your information
• Regular security audits and updates are performed

5. Data Retention

We retain your information for as long as necessary to provide our services:

• Account Information: Retained while your account is active
• Correction History: Stored until you delete it or close your account
• Uploaded Content: Processed and not permanently stored in raw form

6. Your Rights and Choices

You have the following rights regarding your personal information:

• Access: Request a copy of your personal data
• Correction: Update or correct your information through the app settings
• Deletion: Request deletion of your account and associated data
• Export: Request an export of your correction history
• Opt-out: Unsubscribe from promotional communications

To exercise these rights, please contact us at datatandem@gmail.com.

7. Data Sharing and Disclosure

We do not sell your personal information. We may share your information only in the following circumstances:

• Service Providers: With third-party services like OpenAI and Supabase that help us operate the app
• Legal Requirements: When required by law or to protect our rights and safety
• Business Transfers: In connection with a merger, acquisition, or sale of assets

8. Children's Privacy

RedPen is intended for students and educational purposes. While we may serve users under 18, we do not knowingly collect personal information from children under 13 without parental consent. If you believe we have collected information from a child under 13, please contact us immediately.

9. International Data Transfers

Your information may be transferred to and processed in countries other than your country of residence. We ensure appropriate safeguards are in place to protect your information in accordance with this Privacy Policy.

10. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any material changes by:

• Posting the new Privacy Policy in the app
• Updating the "Last Updated" date
• Sending you an email notification for significant changes

11. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or our data practices, please contact us:

12. Consent

By using RedPen, you consent to this Privacy Policy and agree to its terms. If you do not agree with this policy, please do not use our services.