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Back to legal registry LEGAL DOCUMENT VI

Luo Shu (Tử Vi)

Privacy Policy

Version
1.0.0
Last updated
07 Nov 2026
Contact
contact@ryleth.dev

Last updated: 7 November 2026

This English document is a translation of the Vietnamese original. Where the two differ, the Vietnamese version governs.

This privacy policy describes how Luo Shu (Tử Vi) (hereinafter the “App”, “we”, “us”, or “our”) collects, uses, and protects your information. We are committed to respecting user privacy and complying with Apple App Store (Guideline 5.1) and Google Play Store (User Data Policy) requirements.

1. Information We Collect

We collect only the minimum amount of data necessary to provide and operate the core features of the App.

1.1. User Account Information

The App uses an Email and Password authentication system (powered by Supabase Auth). The current release does not integrate or require third-party federated social sign-ins (such as Google Sign-In or Apple ID):

  • Email Address: Used as your unique account identifier for authentication, password recovery, and cross-device data synchronization.
  • Password: Securely salted and hashed one-way using industry-standard cryptography via Supabase Auth. We never store, log, or have access to your plain-text password.

1.2. Astrological Chart Data and Configurations

To cast and render Tử Vi (Purple Star Astrology) charts, the App stores information that you directly enter or generate:

  • Profile name or label associated with each chart.
  • Birth date (Solar or Lunar), birth time, biological gender, and birth location or time zone.
  • Custom star placement options, chart preferences, and personal annotations attached to charts.

1.3. AI Assistant Conversation History

When you interact with the intelligent AI Assistant for chart interpretations, we store your prompts, conversation messages, and relevant chart context to maintain conversational continuity and display your consultation history within the App.

1.4. Coin Balance and Transaction Ledger

The App tracks your available virtual coin balance, consumption logs for AI interpretation requests, and anonymized in-app purchase transaction identifiers from the app store to ensure ledger integrity.

1.5. Information We NEVER Collect

  • We do not collect phone contacts, real-time GPS locations, photos, microphone audio, or external files outside the App scope.
  • We do not bundle any third-party behavioral tracking SDKs, analytics SDKs, crash-reporting SDKs (such as Crashlytics), or advertising networks.
  • We do not collect or track advertising identifiers (IDFA on iOS or GAID on Android).

2. How We Use Your Information

Collected data is used strictly for technical operations and service delivery:

  • Authentication & Security: Managing your login session, verifying data ownership, and protecting against unauthorized access.
  • Cloud Storage & Sync: Allowing you to seamlessly access your saved charts, notes, and consultation history across your personal devices.
  • Delivering AI Interpretations: Forwarding chart context and consultation queries to cloud AI models to generate requested astrological readings.
  • Quota & Balance Management: Accurately crediting purchased coin packs from the app store and debiting coins consumed during AI consultations.
  • No Data Commercialization: We NEVER sell, rent, lease, trade, or share your personal data with third-party advertisers or commercial entities.

3. Third-Party Services

The App relies on a minimal set of trusted infrastructure providers to deliver its services:

  • Supabase (Supabase Inc.): Provides authentication (Supabase Auth) and cloud database (PostgreSQL) services. Data is encrypted in transit (TLS) and protected at rest with Row Level Security (RLS) policies.
  • RevenueCat (RevenueCat Inc.): Verifies receipts and transaction status for In-App Purchases from the Apple App Store and Google Play Store. RevenueCat only processes anonymous store transaction identifiers; we never receive or store your credit card or financial billing information.
  • Cloudflare Workers (Cloudflare Inc.): Provides secure serverless middleware to broker AI interpretation requests and secure account management endpoints.

4. Data Security

All data transmitted between the App and backend servers is encrypted using industry-standard HTTPS/TLS protocols. Cloud databases enforce strict Row Level Security (RLS), guaranteeing that each user can only access and manipulate their own data records.

5. Your Rights and Account Deletion

You retain full control over your personal data:

5.1. View and Modify Data

You can view, update, create, or delete individual astrological charts and chat conversations directly within the App interface at any time.

5.2. In-App Account Deletion

The App provides a built-in, direct, and immediate account deletion mechanism (strictly compliant with Apple App Store Guideline 5.1.1(v) and Google Play User Data policies):

  1. Open Luo Shu (Tử Vi).
  2. Tap your Avatar icon in the top header to navigate to the Profile screen.
  3. Under the Account section, select Delete Account.
  4. Review the data and coin balance warning, type the confirmation keyword DELETE (or XÓA) into the input field, and confirm by tapping Delete Permanently.

Upon confirmation, all account credentials, saved charts, AI chat records, and cloud coin balances are purged immediately and irreversibly from our cloud servers.

5.3. Email Deletion Request (Fallback)

If you cannot access the App on your device, you may submit a deletion request from your registered email address to:

We will verify your identity and process the complete deletion of your data within 7 business days.

6. Policy Updates

We may update this Privacy Policy from time to time to reflect product enhancements or regulatory requirements. The latest revision date will always be displayed at the top of this document.

7. Contact Information

For any questions, concerns, or inquiries regarding this Privacy Policy, please contact: