Privacy Policy

• Account information (email address, nickname, display language, etc.)
• Basic profile information provided when you log in via external authentication (Google)
• Learning data (views, read status, bookmarks, answer history, review status, XP, badges, etc.)
• Activity logs (page views, time spent, etc.) and usage information via cookies and similar technologies

• Providing, maintaining, and improving the Service, and recording/displaying learning progress and results
• Preventing misuse and responding to inquiries
• Improving content and features by analyzing usage

The Site uses cookies and similar technologies to improve usability and analyze usage. We may use Google Analytics (GA4) for analytics. Using Google Consent Mode, measurement and cookie usage are controlled according to your consent status in the cookie consent banner (if you choose "Essential only," measurement is performed without identifiers, i.e., cookieless).

The Site may use Google (Google AdSense) as a third-party advertising provider. Such providers may use cookies to serve ads based on your prior visits. Ad personalization is controlled according to the consent status described above. You can disable the use of advertising cookies by Google via the Google Ads Settings page (https://adssettings.google.com/). For third-party cookie usage, please refer to each provider's policy.

No ads are shown to paid members. You can disable cookies in your browser settings, but some features may become unavailable.

Except as required by law, we do not provide personal information to third parties without the user's consent. We may use external services (such as cloud providers) for authentication, hosting, and similar purposes.

Learning data is retained while you hold an account, in order to provide the Service. If you withdraw, information associated with your account (including your Ask AI question and answer history) will be deleted or anonymized within a reasonable period, except to the extent required by law.

The "Ask AI" feature sends your question, together with the study-material context needed to generate an answer, to an external AI service provider (Anthropic) for processing. The transmitted content is processed for the purpose of generating a response.

Generated answers and your question history are stored to provide and improve the feature (for example, identifying frequently asked questions to enrich the study material) and can be reviewed from My Page. This history is also removed when you withdraw or permanently delete your account.

Answers from this feature are AI-generated and their accuracy is not guaranteed; please always verify important matters against official sources. Do not enter sensitive personal information or anything you would not want transmitted to a third party.

You may request disclosure, correction, suspension of use, or deletion (erasure/anonymization) of your personal information. After logging in, you can withdraw (restorable) and permanently delete your account (erasing learning data and personal information) yourself fromMy Page. For other requests, please contact us viathe contact form. We will respond in accordance with the law after verifying your identity.

For inquiries about this policy, please contact us viathe contact form.