Introduction

Welcome to Couple Compatibility Checker. We respect your privacy and are committed to protecting your personal information. This Privacy Policy explains how we collect, use, and safeguard your data when you use our service.

Information We Process

When you use our Couple Compatibility Checker, you provide:

  • Names and birth dates for compatibility calculations
  • Gender (male/female/other) for Kua Number (Feng Shui) calculations
  • Birth city selection (provides latitude, longitude, and timezone for precise Swiss Ephemeris + BaZi calculations)
  • Optional: Birth time (used for Swiss Ephemeris Moon/Ascendant accuracy, BaZi Hour Pillar, and Human Design chart calculations; defaults to 12:00 local if omitted)

Important: We do NOT store any of this information on our servers. All calculations are performed in real-time and processed server-side temporarily, then immediately discarded after results are returned to you.

How We Use Your Information

The names and birth details you provide are used exclusively for real-time compatibility calculations across Chinese Astrology, Five Elements, Life Path Numbers, Kua Feng Shui, BaZi Four Pillars, Western Astrology, and Human Design. Hour pillars and Human Design charts rely on the submitted birth time; when no time is available we assume 12:00 local, flag the Moon/Ascendant, BaZi Hour Pillar, and Human Design as “approximate” or unavailable, and include that warning directly in the results. All inputs are processed instantly and never stored in any database or file system.

Data Storage & Security

We do not store any personal information on our servers. Names and birth dates are processed temporarily during calculation and immediately discarded. No personal data is saved to our servers, databases, or any storage system.

🔐 Encrypted Local Storage on Your Device: To improve your experience, we store YOUR personal information (your name, birth date, gender, and rising sign) locally on your device using encrypted browser storage. This data:

  • 🔒 Encrypted & Secure: All locally stored data is encrypted using XOR encryption with session-based keys, making it unreadable to malicious scripts or unauthorized access
  • 🖥️ Device-Only Storage: Stored only on your computer/device - never sent to or stored on our servers
  • 🎯 Convenience: Allows the form to remember YOUR information so you don’t have to re-enter it each time
  • 🚫 Partner Privacy: Does NOT include your partner’s information (this is never saved)
  • 🧹 Easy to Clear: Can be cleared anytime by clearing your browser data or changing the information in the form
  • 🔐 Protected Against Attacks: Includes XSS protection, prototype pollution prevention, and input sanitization
  • 🛡️ Never Shared: Never shared with third parties or used for tracking
  • 👤 Your Control: Remains completely private and under your control

✅ Enterprise-Level Security

We implement industry-standard security measures including data encryption, XSS prevention, prototype pollution protection, and secure HTTP headers to ensure your information remains safe and private on your device.

We do not share, sell, or distribute any information. Your partner’s information is never saved anywhere - only your personal data is stored locally and encrypted on your device for convenience.

BaZi day master insights, elemental needs, and hour-pillar warnings are generated on the fly from the same temporary inputs and are never persisted after the response is returned to you.

Cookies and Analytics

We use Vercel Analytics to collect anonymous usage statistics. These analytics help us understand how users interact with our service and improve the overall experience. No personally identifiable information is collected through these analytics.

Server Infrastructure & Data Processing

Frontend: Our web interface is hosted on Vercel, based in Washington, D.C., USA (East) – iad1, with fast worldwide access through their global CDN network.

Backend Calculation Servers: All compatibility calculations are processed on secure backend servers hosted by Render in the Oregon, USA (us-west-2) region. When you submit your information for analysis, it is temporarily sent to these servers for calculation purposes only.

🔒 Data Processing Flow

  1. You enter birth information in your browser
  2. Data is sent via encrypted HTTPS to our backend servers in Oregon (Render)
  3. Calculations performed in real-time (Chinese Zodiac, Elements, Numerology, Kua, BaZi, Western Astrology, Human Design)
  4. Results returned to your browser
  5. All input data immediately discarded - nothing persisted to disk or database

Please review third-party privacy policies:

Your Privacy Rights

Since we don’t store any personal information on our servers, there is no server-side data to access, delete, or manage. Your compatibility calculations are completely private and ephemeral.

For encrypted data stored locally on your device (your name, birth date, gender, and rising sign), you have complete control:

  • Clear it: Clear your browser’s local storage/site data to remove all encrypted data
  • Update it: Change the information in the form to update the encrypted values
  • Secure by design: Encrypted data never leaves your device unless you submit the form for a calculation
  • Session-based keys: Encryption keys change every session, limiting exposure even if accessed

Only anonymous usage analytics (via Vercel Analytics) are collected to help us improve the service. You can contact us anytime with privacy questions or concerns.

Children’s Privacy

Our service is not directed to children under 13 years of age. We do not knowingly collect personal information from children. If you believe we have collected information from a child, please contact us immediately.

Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated revision date. We encourage you to review this policy periodically.

Contact Us

If you have any questions or concerns about this Privacy Policy, please contact us at: musaian.mi@gmail.com