Privacy Policy

Last Updated: November 16, 2025

Welcome to ColloLearn. 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.

1. Information We Collect

1.1 Personal Information

When you create an account, we collect:

• Email address: For account creation and communication
• Username: For account identification
• Password: Stored securely using encryption

1.2 Learning Data

To provide personalized learning experience, we collect:

• Collocations you have learned
• Your favorites and bookmarks
• Learning progress and statistics
• Practice history and quiz results

1.3 Usage Information

We automatically collect certain information when you use the app:

• Device information (model, OS version)
• App version and usage patterns
• Crash reports and error logs
• Session duration and frequency

2. How We Use Your Information

We use your information for the following purposes:

• Provide Services: To deliver the core learning functionality
• Personalization: To track your progress and customize your experience
• Communication: To send important updates, notifications, and support
• Improvement: To analyze usage patterns and improve the app
• Security: To protect against fraud and unauthorized access

3. Data Storage and Security

3.1 Data Storage

Your data is stored securely using Supabase (a secure cloud database service):

• All data is encrypted in transit (HTTPS/TLS)
• Passwords are hashed and never stored in plain text
• Regular backups are performed

3.2 Security Measures

We implement industry-standard security measures including:

• Encryption of sensitive data
• Secure authentication protocols
• Regular security audits
• Access controls and monitoring

4. Data Sharing and Disclosure

We DO NOT sell your personal information to third parties.

We may share your information only in the following circumstances:

• Service Providers: With trusted partners who help us operate the app (e.g., Supabase for database hosting)
• Legal Requirements: When required by law or to protect our rights
• Business Transfers: In case of merger, acquisition, or sale of assets

5. Your Rights and Choices

You have the following rights regarding your data:

• Access: Request a copy of your personal data
• Correction: Update incorrect or incomplete information
• Deletion: Request deletion of your account and data
• Export: Download your learning data
• Opt-out: Unsubscribe from promotional communications

6. Children's Privacy

ColloLearn is intended for users aged 13 and above. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe your child has provided us with personal information, please contact us, and we will delete such information.

7. Third-Party Services

Our app uses the following third-party services:

• Supabase: For authentication and database hosting (Privacy Policy)
• Expo: For app development and updates (Privacy Policy)

8. International Data Transfers

Your information may be transferred to and processed in countries other than your country of residence. We ensure that such transfers comply with applicable data protection laws and that your data receives adequate protection.

9. Data Retention

We retain your personal information for as long as necessary to:

• Provide you with our services
• Comply with legal obligations
• Resolve disputes and enforce agreements

When you delete your account, we will delete or anonymize your personal data within 30 days, except where we are required to retain it by law.

10. Cookies and Tracking

Our app uses local storage (AsyncStorage) to store:

• Authentication tokens
• User preferences
• Cached learning data

This data is stored locally on your device and can be cleared by uninstalling the app or clearing app data.

11. Changes to This Privacy Policy

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

• Posting the new Privacy Policy in the app
• Sending you an email notification
• Displaying an in-app notification

Your continued use of the app after changes are posted constitutes acceptance of the updated Privacy Policy.

12. Contact Us

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