Last updated: October 1, 2025
Introduction
YuGiOh Genesys ("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 YuGiOh Genesys format tools and services.
When you create an account or use our services, we may collect:
- Account Information: Email address, username, and authentication credentials (via Google or GitHub OAuth)
- Deck Information: Custom deck builds, saved card lists, and deck notes you create
- User Preferences: Language settings, theme preferences, and tool configurations
- Communications: Messages you send to us through our contact form or support channels
We automatically collect certain information when you use our services:
- Usage Data: Features used, decks created, cards searched, and time spent on the platform
- Device Information: Browser type, operating system, IP address, and device identifiers
- Analytics: Page views, click patterns, and navigation paths (via privacy-respecting analytics)
We use your information to:
- Provide Services: Enable deck building, card database searches, and point calculations
- Improve User Experience: Personalize content, remember your preferences, and optimize performance
- Account Management: Authenticate users, secure accounts, and manage subscriptions
- Communication: Send service updates, respond to inquiries, and provide customer support
- Development: Analyze usage patterns to improve features and develop new tools
- Legal Compliance: Comply with applicable laws and protect our rights
Data Storage and Security
- Cloud Storage: User data is stored securely on Cloudflare infrastructure with encryption
- Local Storage: Deck drafts and preferences may be stored locally in your browser
- Authentication: We use Better Auth with industry-standard OAuth 2.0 for secure authentication
- Encryption: All data transmission is encrypted using HTTPS/TLS
- Access Control: Strict access controls limit who can view or modify user data
We do not sell, rent, or trade your personal information. We may share information only in these circumstances:
- Service Providers: With trusted partners who help operate our services (e.g., Cloudflare, payment processors)
- Legal Requirements: When required by law or to protect our rights and safety
- Business Transfers: In connection with a merger, acquisition, or sale of assets
- With Your Consent: When you explicitly authorize sharing
Third-Party Services
We integrate with:
- Authentication: Google OAuth, GitHub OAuth (via Better Auth)
- Payment Processing: Creem (for subscriptions and payments)
- Email Service: Resend (for transactional emails)
- Infrastructure: Cloudflare (Workers, Pages, D1 database, KV storage)
These services have their own privacy policies governing their use of your information.
Cookies and Tracking
We use cookies and similar technologies to:
- Maintain your login session
- Remember your language and theme preferences
- Analyze site usage and performance
- Provide cookie consent management
You can control cookies through your browser settings, but some features may not function properly without them.
Your Rights and Choices
You have the right to:
- Access: Request a copy of your personal data
- Update: Modify your account information and preferences
- Delete: Request deletion of your account and associated data
- Export: Download your deck data in a portable format
- Opt-Out: Unsubscribe from marketing communications
- Data Portability: Request your data in a machine-readable format
To exercise these rights, contact us at contact@yugiohgenesys.net or use the account settings page.
Children's Privacy
YuGiOh Genesys is not intended for users under 13 years of age. We do not knowingly collect information from children. If you believe we have collected information from a child, please contact us immediately.
Data Retention
We retain your information for as long as your account is active or as needed to provide services. After account deletion, we may retain certain information for legal compliance, dispute resolution, and fraud prevention.
International Data Transfers
Your information may be transferred to and processed in countries other than your own. We ensure appropriate safeguards are in place to protect your data in accordance with this Privacy Policy.
Changes to This Policy
We may update this Privacy Policy periodically. We will notify you of significant changes by posting a notice on our website or sending an email. Your continued use of our services after changes constitutes acceptance of the updated policy.
If you have questions about this Privacy Policy or wish to exercise your privacy rights, please contact us:
Disclaimer
YuGiOh Genesys is an official format of the Yu-Gi-Oh! Trading Card Game created by Konami. This website is a fan-created tool and resource platform that is not affiliated with, endorsed by, or associated with Konami. All Yu-Gi-Oh! card data, images, trademarks, and game mechanics are the property of Konami Digital Entertainment.