Privacy Policy

Last updated: April 26, 2026

1. Information we collect

We collect your email, usage activity, editing logs (only the ones you confirm), hashed IP address (sha256), and user agent. We do not transmit screenshots or screen captures to our servers.

2. How we use it

To provide the service, personalize learning, analyze aggregate usage, prevent abuse, and comply with applicable law. Anonymized statistics may be used to improve the product or for public reports.

3. Sharing

We do not share personally identifiable information with third parties, except where required by law. Payment processing is delegated to Stripe, Inc.

4. Storage and deletion

Data is stored in Japan-region infrastructure by default. On account deletion or request, we permanently delete identifiable data within 14 days (excluding backups).

5. Contact

For data access, correction, deletion, or opt-out requests, please contact us using the contact information in the footer.