1 Overview
Saju365 ("the App") is a Korean Four Pillars of Destiny (Saju/BaZi) reading app developed by GuardPhrase Studio. We are committed to protecting your privacy. This Privacy Policy explains what information the App uses, how it is stored, and your rights as a user.
By installing or using the App, you agree to this Privacy Policy.
2 Information We Collect
The App does not collect personally identifiable information such as your name, email address, or phone number. The following data is stored locally on your device only and is never transmitted to our servers.
| Data | Storage Location | Purpose |
|---|---|---|
| Birth date, time, and gender (entered by user) | On-device (DataStore) | Calculate and display Saju chart and fortune readings |
| Saved chart profiles (up to 10) | On-device (DataStore) | Allow users to save and reload multiple charts |
| Language preference (Korean / English) | On-device (DataStore) | Display app content in selected language |
| AI reading results (cached per session) | On-device (DataStore) | Avoid duplicate API calls; restore previous readings |
| Advertising identifier (ADID / GAID) | Google AdMob servers (external) | Serve banner and rewarded ads |
3 Purpose of Data Use
- Calculate and display your Four Pillars of Destiny (Saju) chart
- Provide daily, weekly, monthly, yearly, and lifetime fortune readings
- Provide compatibility (Gunghap) readings between two charts
- Find best and worst compatibility matches from calculated candidates
- Restore previously generated AI readings without re-calling the API
- Display banner and rewarded advertisements
4 AI Reading Service (OpenAI)
The App offers an optional AI-powered fortune reading feature using the OpenAI API (GPT-4o mini). When you tap "Get AI Reading," the following non-personal Saju chart data is sent to OpenAI:
- Day Master (Heavenly Stem and Element)
- Four Pillars chart structure (year, month, day, hour pillars)
- Element balance, strength level, and favorable element
- Personality trait tags and fortune scores
5 Third-Party Services
The App uses the following third-party services:
| Service | Purpose | Privacy Policy |
|---|---|---|
| Google AdMob | Banner and rewarded advertisements | Google Privacy Policy |
| OpenAI API | AI-powered fortune readings (optional) | OpenAI Privacy Policy |
6 Data Retention and Deletion
- All data is stored locally on your device and is automatically deleted when you uninstall the App
- You can delete saved profiles at any time from the Profiles screen
- AI reading cache is automatically reset at midnight each day (daily/weekly/monthly readings)
- Lifetime readings are cached permanently until the App is uninstalled
- The developer has no access to data stored on your device
7 App Permissions
- Required Internet access — Required for AI readings, content updates, and ad delivery
The App does not request access to your camera, microphone, location, contacts, or device storage.
8 Your Rights
- You can view, edit, or delete your saved profiles at any time within the App
- You can reset or limit your advertising ID through your device settings
- Uninstalling the App permanently removes all locally stored data
- For any privacy-related inquiries, please contact us at the address below
9 Children's Privacy
Saju365 is not directed at children under the age of 13. We do not knowingly collect any information from children. If you believe a child has used this App, please contact us so we can take appropriate action.
10 Disclaimer
The fortune readings and compatibility analyses provided by Saju365 are for entertainment and personal reflection purposes only. They do not constitute professional advice of any kind. The App makes no guarantees regarding the accuracy or outcomes of any reading.
11 Contact Us
App: Saju365
Developer: GuardPhrase Studio
Email: guardphrase365@gmail.com
Effective Date: July 24, 2026
Last Updated: July 24, 2026