Privacy Policy

Last updated: March 2026 · G PRO AI Lab

⚠️ AI Goniometer is for informational purposes only and is not a medical device. It does not provide diagnosis, treatment, or clinical assessment.

This Privacy Policy explains how AI Goniometer (gproailab.com), operated by G PRO AI Lab, collects, uses, and protects your information when you use our AI-powered joint angle measurement tool.

G PRO AI Lab acts as the data controller responsible for the processing of personal data described in this policy.

1. Photos and Image Processing

AI Goniometer analyzes the photos you provide to calculate joint angles. Images are transmitted via an encrypted connection and processed on our secure server. Results are returned to you within seconds.

Your images are not used for advertising and are never shared with any third party.

We may use limited non-identifying data (such as angle values and keypoint information) to continuously improve measurement accuracy and reliability.

You remain in control of your data and may request deletion at any time (see Section 8: Your Rights).

2. Data We Collect

When you use AI Goniometer, we may collect:

• Account information: your Google account email address when you sign in with Google.
• Usage data: the number of measurements performed (stored locally in your browser via localStorage, and on our server for logged-in users to track free-use limits).
• Measurement angle values: if you submit optional feedback, we record the calculated angle value alongside the feedback image.
• Payment information: Payment processing is handled entirely by Creem, our payment processor. All payment information is processed directly by Creem and is subject to Creem’s Privacy Policy. We do not store credit card numbers; only confirmation of payment and email are received.
• Server logs: standard web server access logs (IP address, browser type, pages visited). These are retained for up to 30 days for security purposes.

3. How We Use Your Data

• To manage your account and subscription status.
• To enforce free measurement limits (5 free measurements per user).
• To process subscription payments via Creem.
• To improve AI detection accuracy using voluntarily submitted feedback images.
• To maintain security and prevent abuse of the service.

4. Legal Basis for Processing (GDPR)

• Performance of a contract: To provide the AI Goniometer service, manage your account, and process subscriptions.
• Legitimate interests: To maintain service security, prevent abuse, enforce usage limits, and improve system stability.
• Consent: When you voluntarily submit feedback images or optional information, you provide consent for us to process that data for AI improvement purposes.

5. Data Sharing

We do not sell, rent, or share your personal data with third parties for marketing purposes. Data is only shared with:

• Creem — our payment processor. Creem handles all payment data under their own Privacy Policy.
• Google — when you use Google Sign-In, your authentication is handled by Google's Identity Services under Google's Privacy Policy.
• We do not sell your personal data to third parties under any circumstances.

6. Data Storage and Security

User account and subscription data is stored on a secured cloud server with SSL/TLS encryption. If you are located outside China, your data may be transferred to and processed in China, where data protection laws may differ from those in your jurisdiction.

7. Data Retention

• Account data is retained for as long as your account remains active.
• Subscription and payment confirmation records are retained as required for legal, tax, and accounting compliance.
• Server access logs are retained for up to 30 days for security monitoring purposes.
• If you request account deletion, your personal data will be permanently removed within 30 days, unless retention is required by law.

8. Your Rights

You have the right to:

• Request access to the personal data we hold about you.
• Request deletion of your account and associated data.
• Withdraw consent for optional data collection (e.g., stop submitting feedback).

To exercise any of these rights, email us at support@gproailab.com. We will respond within 30 days.

9. Cookies and Local Storage

We use browser localStorage (not cookies) to store your measurement count and login state between sessions. No third-party tracking cookies are used. We do not use third-party analytics or tracking cookies.

10. Children's Privacy

AI Goniometer is not directed at children under 16. We do not knowingly collect personal information from children.

11. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify users of significant changes by posting a notice on the website. Continued use of the service after changes constitutes acceptance of the updated policy.

12. Data Controller and Contact Information

AI Goniometer is operated by G PRO AI Lab, which acts as the data controller for the personal data collected through this website.

If you have any questions about this Privacy Policy or wish to exercise your data protection rights, you may contact us at:

Email: support@gproailab.com
Operator: G PRO AI Lab