Privacy Policy

Account Data
Email address (for authentication), display name and username (chosen by you).

Birth Data
Date of birth (required), time of birth (optional), location of birth (optional), gender/polarity (required for Bazi calculation).

Chart Data (derived)
Computed Four Pillars (Bazi) chart, Day Master archetype and element balance, Luck Pillar timeline, fortune readings (daily, weekly, monthly).

People Vault Data
Names and birth data of people you choose to add, and computed compatibility scores.

Technical Data
Device type and operating system (for app compatibility), app version.

We do not collect location data, contacts, browsing history, or any data beyond what is listed above.

Chart Computation: Your birth data is used exclusively to calculate your Bazi chart, fortune readings, and compatibility scores.

Authentication: Your email is used to sign in and manage your account.

Communication: Optional weekly fortune alert notifications (you control this in Settings).

We do not:

• Sell, rent, or share your data with third parties
• Use your data for advertising or ad targeting
• Build behavioral profiles or track you across apps
• Use third-party analytics or tracking SDKs

• All data is stored in Supabase (cloud infrastructure backed by AWS) in the Asia-Pacific region
• Authentication tokens are stored in your device's secure storage (iOS Keychain / Android Keystore)
• All data is transmitted over HTTPS/TLS encryption
• Database access is protected by row-level security — you can only access your own data
• We do not store passwords in plain text (handled by Supabase Auth with bcrypt hashing)

Access: View all your data in-app via Profile, Settings, and your Bazi chart.

Deletion:Delete your account and all associated data at any time from Settings > Security > Delete Account. This permanently removes your profile, charts, saved connections, and fortune cache. If you cannot access the app, email privacy@daymaster.co with the subject “Account Deletion Request.”

Data Portability: Contact privacy@daymaster.co to request a copy of your data. We will respond within 5 business days.

Correction: Edit your profile data (name, username, email) in-app at any time via Settings.

DayMaster requires users to be at least 13 years of age. We do not knowingly collect personal data from children under 13. If we learn that we have collected data from a child under 13, we will delete it promptly.

We do not use Firebase, Sentry, Amplitude, Mixpanel, Facebook SDK, or any advertising or analytics services.

This website uses no cookies and no tracking pixels. The DayMaster mobile app uses no cookies. We do not participate in cross-app tracking or IDFA collection.

We may update this Privacy Policy from time to time. Material changes will be communicated via in-app notification. Continued use of DayMaster after changes constitutes acceptance of the updated policy.

For questions about this Privacy Policy or your data:
Email: privacy@daymaster.co
Response time: Within 5 business days