1. Introduction

This Privacy Policy explains the information collected by AI-chan (the "Service") and how it is used.

2. Information We Collect

Access Logs

We record a SHA-256 hash of your IP address and user agent as access logs. Raw IP addresses are not stored on the server. Hash values are rotated daily and cannot be used for long-term tracking.

Browser Local Storage

The following information is stored in your browser's local storage. This data is not sent to the server.

• edit_token — Token for editing characters
• visited flag — Flag for detecting first visit
• my_characters — List of your characters
• ai-chan-lang — Language preference setting

Vercel Analytics / Speed Insights

We use Vercel Analytics and Speed Insights to collect anonymous usage data. No personally identifiable information is included.

3. Purpose of Use

The collected information is used for the following purposes.

• Detection and prevention of fraudulent use and spam
• Improving the Service and enhancing quality

4. Third-Party Services

The Service uses Vercel Analytics. For Vercel's privacy policy, please refer to Vercel's official website.

5. Data Storage

Character data and access logs are stored on Supabase.

6. Changes to This Policy

This policy may be changed without prior notice. Continued use of the Service after changes constitutes acceptance of the revised policy.

7. Effective Date

March 28, 2026