Privacy Policy

Cheongyak Calculator values and protects your privacy

Effective Date: March 14, 2026

1 Information We Collect

Cheongyak Calculator does not require account registration and does not collect personally identifiable information such as name, email address, or phone number. We only process the minimum information necessary to provide our service.

DataPurposeNote
Subscription Score DataScore calculation and historyStored on device only (no server transmission)
Bookmarked ComplexesSchedule notifications for interested complexesStored on device only (no server transmission)
FCM TokenPush notificationsAuto-generated
Advertising IdentifierAd delivery (Google AdMob)Subject to Google's policy

All calculation data including subscription scores and payment amounts are stored only on the user's device and are never transmitted to external servers.

2 Purpose of Use

The collected information is used solely for the following purposes:

  • Subscription score calculation and result storage
  • Payment recognition amount calculation
  • Schedule inquiry and bookmark notification delivery
  • Winning probability simulation
  • Service improvement and error analysis

3 Data Retention and Deletion

DataRetention Period
Score Calculation HistoryStored on device until manually deleted by user
Bookmarked ComplexesStored on device until removed by user
Notification SettingsAutomatically deleted when app is uninstalled
FCM TokenAutomatically deleted when app is uninstalled

Uninstalling the app will automatically delete all data stored on the device, including calculation history, bookmarks, and settings.

4 Third-Party Sharing

Cheongyak Calculator does not share your personal information with third parties. However, the following platform services operate under their own privacy policies:

  • Google AdMob - Banner and interstitial ad delivery, subject to Google's privacy policy
  • Firebase (Google) - Push notification (FCM) delivery, subject to Google's privacy policy
  • Public Data Portal (data.go.kr) - Subscription schedule data retrieval, subject to their API policy

5 Advertising

Cheongyak Calculator uses Google AdMob to display banner and interstitial advertisements. AdMob may collect device identifiers, advertising IDs, and other information for ad delivery purposes, subject to Google's Privacy Policy.

6 Children's Privacy

Cheongyak Calculator does not intentionally collect personal information from children under the age of 14 (or the applicable age of consent in your jurisdiction). If we become aware that a child has provided personal information, we will promptly delete it.

7 Security

Cheongyak Calculator implements the following security measures to protect your information:

  • All API communications are encrypted using HTTPS (SSL/TLS)
  • User data is stored exclusively on the device, eliminating the risk of external data leakage
  • Subscription schedule data is retrieved through the official public data portal API

8 Changes to This Policy

If this Privacy Policy is updated, we will notify you through in-app announcements. The revised policy will take effect on the date it is posted.

9 Contact Us

If you have any questions about this Privacy Policy
or wish to make a privacy-related request, please contact us.

mybuilder.77@gmail.com