Privacy Policy
Learn how we collect, use, and protect your personal information
Last updated: February 28, 2026
LuckyTCF ("we", "us", or "our") respects and protects your privacy. This Privacy Policy explains how we collect, use, store, and protect your personal information when you use the LuckyTCF platform (including the web version and mobile app). By using our services, you agree to the data practices described in this policy.
Information We Collect
Account information: email address, username, and avatar collected during registration
Learning data: practice records, mock exam scores, mistake tracker, learning statistics, and other usage data
Device information: device type, operating system version, and app version, used to optimize the service experience
Log information: access times, page views, and error logs, used for service maintenance and improvement
How We Use Your Information
Provide and maintain LuckyTCF's core exam prep services
Save and sync your learning progress, practice records, and personal settings
Generate learning analytics to help you understand your preparation status
Send study reminder notifications (only when you enable this feature)
Improve product features and user experience
How We Protect Your Information
All data is transmitted using HTTPS/TLS encryption
Passwords are encrypted using industry-standard algorithms — we cannot view your plaintext password
Regular security audits and vulnerability assessments are conducted
Strict internal access controls limit staff access to user data
Servers are deployed on secure cloud infrastructure with disaster recovery capabilities
Third-Party Services
We use Google OAuth for sign-in services, which is governed by Google's Privacy Policy
We do not sell your personal information to any third party
We may use anonymized, aggregated data for statistical analysis
If we need to share data with third parties, we will obtain your explicit consent in advance
Your Rights
Right of access: you can view and export your personal data at any time
Right of rectification: you can update your account information on your profile page
Right of erasure: you can request deletion of your account and all associated data
Right to withdraw consent: you can withdraw your consent to data processing at any time
Right to data portability: you can request your data in a commonly used format
Children's Privacy
LuckyTCF's services are intended for adult users. We do not knowingly collect personal information from individuals under the age of 16. If we discover that we have collected data from a minor, we will promptly delete it.
Changes to This Policy
We may update this Privacy Policy from time to time. For significant changes, we will notify you via in-app notifications or email. Continued use of our services constitutes acceptance of the updated policy.