Privacy Policy

Effective: March 30, 2026

The 2D:4D Test ("Service") values your privacy and processes personal information as described below.

1. Information We Collect

This service does not require sign-up and does not collect personal information. • Palm photos: Processed only on your device and never sent to any server • Gender selection: Used only to apply classification thresholds; not stored • Cookies/Local Storage: Used only for functional purposes such as test count and language settings

2. Purpose of Data Processing

• Providing the 2D:4D finger ratio analysis service • Anonymous, non-identifiable usage statistics • Improving user experience

3. Data Retention & Deletion

This service does not store any user data on servers. All analysis is performed on your device (browser) and is automatically cleared when the session ends.

4. Third-Party Services

• Google AdSense: May use cookies for ad delivery. Please refer to Google's Privacy Policy. • MediaPipe (Google): The hand detection AI model runs entirely in your browser. No image data is transmitted externally. • Coupang Partners: The result page displays Coupang Partners dynamic banners and recommendation links. Clicking a banner/link redirects to Coupang, where Coupang's own cookie and tracking policies apply. Please refer to Coupang's privacy policy for details.

5. Your Rights

• You can delete or block cookies through your browser settings • Local storage data can be cleared through your browser settings

6. Contact

For privacy-related inquiries, please contact us at: Email: flexchool@gmail.com