Privacy Policy

Last updated: January 20, 2026

YUANJIE Co., Ltd. ("we", "us", or "our") operates the PrimeNote mobile application and website (collectively, the "Service"). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our Service.

1. Information We Collect

Account Information: When you create an account, we collect your email address, name, and password.

User Content: We collect the content you create and upload, including:

  • Voice recordings and audio files
  • PDF documents and images
  • Text notes and annotations
  • Links to external content (YouTube, websites, etc.)
  • AI-generated content (summaries, flashcards, quizzes, podcasts)

Usage Data: We automatically collect information about how you interact with our Service, including features used, learning progress, flashcard performance, and session duration.

Device Information: We collect device type, operating system, app version, unique device identifiers, and network information.

2. How We Use Your Information

We use the collected information to:

  • Provide AI-powered transcription, summarization, and content generation
  • Generate personalized learning materials (flashcards, quizzes, mind maps, podcasts)
  • Implement spaced repetition algorithms for optimal learning
  • Sync your data across devices
  • Improve our AI models and Service quality (with anonymized data only)
  • Send service notifications and updates
  • Provide customer support

3. AI Processing

Your content is processed by our AI systems to provide features such as transcription, summarization, flashcard generation, and podcast creation. We do not use your personal content to train our AI models without your explicit consent. AI processing occurs on secure cloud servers with enterprise-grade encryption.

4. Data Security

We implement robust security measures to protect your data:

  • All data is encrypted in transit using TLS 1.3
  • All data is encrypted at rest using AES-256
  • Regular security audits and penetration testing
  • Strict access controls with activity logging
  • Secure cloud infrastructure with redundant backups

5. Data Sharing

We do not sell your personal information. We may share data with:

  • Service Providers: Cloud hosting, AI processing, and analytics partners, bound by confidentiality agreements
  • Legal Requirements: When required by law or to protect our rights
  • With Your Consent: When you choose to share content with others via sharing features

6. Data Retention

We retain your data for as long as your account is active. Upon account deletion:

  • Personal data is deleted within 30 days
  • Shared content links are immediately deactivated
  • Backup copies are purged within 90 days

7. Your Rights

You have the right to:

  • Access: Request a copy of your personal data
  • Correction: Update or correct inaccurate data
  • Deletion: Delete your account and associated data
  • Export: Download your data in standard formats (PDF, Markdown, audio)
  • Restriction: Limit how we process your data
  • Objection: Opt out of certain data processing activities

8. International Data Transfers

Your data may be processed in countries other than your own. We ensure appropriate safeguards are in place to protect your data in compliance with applicable laws.

9. Children's Privacy

Our Service is not intended for children under 13. We do not knowingly collect personal information from children under 13. If we discover such data has been collected, we will delete it promptly.

10. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of significant changes via email or in-app notification before they take effect.

11. Contact Us

If you have questions about this Privacy Policy or wish to exercise your rights, please contact us:

YUANJIE Co., Ltd.
Email: privacy@primenote.app