Privacy policy

Last Updated: 2025

LingChain (“we,” “our,” or “us”) is committed to protecting your privacy and ensuring that your personal data is handled securely. This Privacy Policy explains how we collect, use, disclose, and protect your information when you use:

  • LingChain mobile application (iOS/Android)

  • LingChain smart bracelet & BLE-connected devices

  • LingChain official websites, including www.lingchain.vip

  • LingChain online stores (Shopify, Etsy, independent sites)

Please read this Privacy Policy carefully. If you do not agree with the terms, please discontinue using our services.

1. Information We Collect

We collect only the minimum information necessary to provide and improve our services.

1.1 Information You Provide to Us

Account Information

  • Email address

  • Region and language preferences

  • Third-party login identifiers (Google / Apple)

We do not collect your passwords for Google or Apple login.

Personal Profile Information

Used exclusively for astrology, Five Elements (Wu-Xing), chakra analysis, and personalized energy recommendations:

  • Name or nickname

  • Gender

  • Date and time of birth

  • Place of birth

  • Current residence and time zone

Device Pairing Information

When you connect a LingChain BLE smart device:

  • Device ID or serial number

  • Vibration feedback logs

  • Energy loop activation data

  • Battery status

We do not collect precise location from Bluetooth scanning.

Content You Generate or Upload

  • Daily check-ins, meditation notes, Lingyu Wall entries

  • Photos you voluntarily upload when sharing Lingyu Cards

  • Feedback, support messages

1.2 Information We Collect Automatically

Device Information

  • Mobile device model (e.g., iPhone 14 Pro Max)

  • Operating system version

  • App version

  • IP address (for content localization only)

Usage Data

  • Interaction logs (feature usage frequency, navigation)

  • In-app events

  • Crash logs and diagnostics (via Firebase / Sentry)

Cookies & Web Analytics

When you browse www.lingchain.vip, we may collect:

  • Page visits

  • Browser type

  • Traffic analytics (via Shopify or other tools)

2. How We Use Your Information

We use your information for the following purposes:

(1) Core App Functions

  • Generate personalized metaphysical insights

  • Provide daily Lingyu (affirmation) cards

  • Power energy-loop and vibration feedback

  • Manage account login and authentication

  • Enable BLE connection with the smart bracelet

(2) Product Improvement

  • Analyze app usage to optimize user experience

  • Identify bugs and improve stability

(3) Customer Support

  • Respond to your inquiries

  • Provide troubleshooting assistance

(4) Legal Compliance

  • Prevent fraud

  • Comply with regulatory requirements for purchases, payment, and security

We do not:
❌ Sell your personal data
❌ Use your information for targeted advertising
❌ Collect photos or contacts without explicit permission

3. How We Share Your Information

We only share your information under the following circumstances:

3.1 Service Providers

We may share limited data with trusted partners that help us deliver core services, such as:

  • Supabase / Firebase (data storage & authentication)

  • Shopify (online store operations)

  • Google & Apple (login services)

  • Expo / BLE services (device connectivity)

All partners must comply with strict data protection regulations (GDPR/CCPA).

3.2 Legal Requirements

We may disclose information if required by:

  • Court orders

  • Government authorities

  • Laws and regulations

3.3 Business Transfers

If LingChain undergoes a merger, acquisition, or asset transfer, your data may be transferred with proper notice.

4. Your Rights (GDPR, CCPA & Global Compliance)

No matter where you live, you have the right to:

  • Access the information we hold about you

  • Correct inaccurate information

  • Delete your account and personal data

  • Withdraw consent at any time (e.g., Bluetooth, notifications)

  • Export your data in a portable format

  • Opt-out of data processing where applicable

You may request these through the in-app settings or by contacting us.

5. Data Storage & International Transfers

Your data may be stored or processed in:

  • The United States

  • Singapore

  • Europe

We use industry-standard security and ensure all cross-border transfers comply with GDPR and other applicable laws.

6. How We Protect Your Information

We implement the following security measures:

  • AES-256 encrypted database storage

  • TLS/HTTPS encrypted data transmission

  • Strict access permissions

  • Continuous monitoring of security risks

While we apply best practices, no system is completely immune to risks.

7. Children’s Privacy

LingChain is intended for users 16 years of age or older.
Users under 16 must obtain permission from a parent or guardian.

8. Third-Party SDKs Used

LingChain may integrate the following SDKs:

  • Firebase Authentication

  • Firebase Crashlytics

  • Supabase Client

  • Expo modules (BLE, Haptics, Permissions)

  • Google OAuth SDK

  • Apple Authentication Services

These SDKs collect only the minimum data required to operate their functionalities.

9. Changes to This Policy

We may update this Privacy Policy to reflect changes in our services or legal obligations.
We will notify you by posting the updated version in the App or on our website.

10. Contact Us (Data Deletion & Support)

For data access, correction, export, or deletion requests, please contact:

📧 support@lingchain.vip

🌐 www.lingchain.vip

We typically respond within 15 business days.