Privacy Policy

Last Updated: January 2025

Summary: We do not collect any personal information. This is a free calculation tool that processes your inputs locally and does not store any data.

1. Information We Do NOT Collect

This website is designed as a privacy-first tool. We do not collect, store, or process:

Your calculation inputs (procurement amounts, flat numbers, meeting attendees, etc.)
Calculation results
Personal information (name, email, phone number, address)
Cookies or tracking identifiers
User accounts or login credentials
Third-party analytics or advertising data

2. Minimal Technical Data (Anti-Abuse Only)

To protect the service from automated attacks and ensure fair usage, we temporarily store:

IP Address: Stored in memory for 60 seconds only, used for rate limiting (20 requests per minute)
Server Logs: Automatically generated by Google Cloud Run, retained for 30 days maximum for system maintenance and security monitoring

Important: IP addresses are considered personal data under Hong Kong PDPO and EU GDPR. We process them solely for security purposes and delete them as soon as possible.

3. How Your Inputs Are Processed

All calculations are performed in real-time and processed ephemerally:

Your browser sends calculation requests to our server
The server processes the calculation immediately
Results are sent back to your browser
No data is written to any database
Server memory is cleared after processing

4. Third-Party Services

We use the following third-party infrastructure services:

Google Cloud Run: Hosting infrastructure (subject to Google's privacy policy)
Cloudflare: DNS and domain management (subject to Cloudflare's privacy policy)

We do NOT use:

Google Analytics or any tracking scripts
Advertising networks
Social media tracking pixels

5. Data Sharing

We do not sell, rent, or share any user data with third parties. Since we don't collect personal data, there is nothing to share.

6. Your Rights

Under Hong Kong Personal Data (Privacy) Ordinance (PDPO), you have the right to:

Access your personal data (Note: We don't store any)
Request deletion (Note: Data is automatically deleted after 60 seconds)
Object to processing (You can stop using the service at any time)

7. Security

We implement industry-standard security measures:

HTTPS encryption for all communications
CORS (Cross-Origin Resource Sharing) restrictions
Request signing and validation
Rate limiting to prevent abuse

8. Changes to This Policy

We may update this Privacy Policy occasionally. The 'Last Updated' date will reflect any changes. Continued use of the service constitutes acceptance of the updated policy.

9. Contact Information

If you have questions about this Privacy Policy, please contact us at:

Email: hkbmo2024@gmail.com