Privacy Policy
Last updated: March 2, 2026
1. Introduction
Kototabi ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you use our web application at kototabi.app (the "Service").
2. Information We Collect
Information You Provide
- Account information (email address) when you create an account
- Learning progress and quiz scores
Automatically Collected Information
- Usage data through Google Analytics (pages visited, time spent)
- Device and browser information
- IP address
3. How We Use Your Information
- To provide and maintain the Service
- To save your learning progress
- To improve our content and user experience
- To communicate with you about updates to the Service
4. Data Storage and Security
Your data is stored securely using Supabase, which provides encryption at rest and in transit. We implement appropriate technical and organizational measures to protect your personal information.
5. Third-Party Services
We use the following third-party services:
- Supabase — Authentication and data storage
- Google Analytics — Usage analytics
- Vercel — Hosting and deployment
Each of these services has their own privacy policies governing their use of your data.
6. Cookies
We use essential cookies to maintain your session and preferences. Google Analytics may use cookies to collect usage data. You can control cookie settings through your browser.
7. Your Rights
You have the right to:
- Access your personal data
- Request correction of your data
- Request deletion of your account and data
- Opt out of analytics tracking
8. Children's Privacy
The Service is not directed to children under 13. We do not knowingly collect personal information from children under 13.
9. Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new policy on this page and updating the "Last updated" date.
10. Contact Us
If you have questions about this Privacy Policy, please contact us at support@kototabi.com.