Privacy Policy

1. Introduction

Yujin is an English reading app designed for children and their parents.

We are committed to protecting the privacy and safety of all users, especially children. This policy explains what information we collect, how we use it, and how we protect it.

2. Who this applies to

This service is intended for:

• Parents or guardians who create and manage accounts
• Children who use the app under parental supervision

Children do not create independent accounts.

3. Information we collect

3.1 Parent information

When a parent registers, we may collect:

• Email address
• Account authentication data, such as login tokens

We do not require unnecessary personal information.

3.2 Child profiles

Parents may create profiles for children. These may include:

• First name or nickname
• Grade level
• Learning progress data

We do not require real names.

3.3 Usage data

We collect limited data to improve the learning experience, such as:

• Reading activity, including lessons completed
• Session progress and in-app interaction
• Basic device and browser information

4. How we use information

We use collected information to:

• Provide and operate the service
• Track learning progress
• Improve lesson quality and user experience
• Maintain security and prevent misuse

We do not use children’s data for advertising.

5. Data sharing

We do not sell personal data.

We only share data when necessary, such as:

• With trusted service providers for hosting, authentication, and technical operations
• When required by law

We choose third-party services with privacy and security in mind.

6. Children’s privacy

We take children’s privacy seriously.

• Children cannot create accounts without a parent or guardian
• We collect only the minimum data necessary for learning
• We avoid collecting sensitive personal information
• We do not provide public profiles or social sharing features for children

Parents remain in control of their child’s data.

7. Data security

We implement reasonable safeguards to protect data, including:

• Secure authentication systems
• Encrypted data transmission using HTTPS
• Restricted access to stored data

No system is completely secure, but we continuously work to improve our protections.

8. Data retention

We retain data only as long as necessary to:

• Provide the service
• Maintain account functionality
• Meet legal or operational requirements

Parents may request deletion at any time.

9. Parent rights

Parents or guardians may:

• Access their child’s data
• Update or correct information
• Request deletion of child profiles
• Delete their account

Requests can be made through the contact information below.

10. Cookies and device data

We may use cookies or similar technologies to:

• Maintain login sessions
• Improve usability
• Support device connection and child access flows

We do not use tracking cookies for advertising purposes.

11. Changes to this policy

We may update this policy from time to time.

If changes are significant, we will notify users through the app, website, or email when appropriate.

12. Contact

If you have questions or requests regarding privacy, please contact User Support.