Privacy Policy

Last updated: October 19, 2026

This Privacy Policy explains how SeulStudio ("we", "our", or "the Developer") handles information in Hazardous Materials Industrial Engineer Practical Exam (위험물산업기사 실기 합격노트) (the "App"), package ID com.seul.hazardpracticalapp, version 3.0.0.

The App is a Korean-language offline Flutter study application for the Hazardous Materials Industrial Engineer practical examination. It provides 29 content pages across six study areas, 573 practice questions, 584 flashcards, 146 formula/reaction cards, 1,586 fill-in-the-blank items, and related learning tools.

1. Information Processed by the App

The App's core study features do not require account registration or the submission of a name, email address, telephone number, or contacts.

• Learning progress, last-read page and bookmarks
• Quiz answers, scores, accuracy and incorrect-answer history
• Flashcard review and memorization progress
• Examination date and D-day preferences
• Other locally saved learning preferences

2. Quiz and Examination Practice

The App provides 573 practice questions, including a timed 20-question mock quiz with 15-, 20-, 30-, or 40-minute options, subject-based practice, and incorrect-answer review. Responses and results are processed to support study and feedback. These are educational practice questions, not a reproduction of the official practical examination format.

3. Learning Materials and Subject Content

The App covers hazardous materials classification and designated quantities, properties and chemical reactions, manufacturing facility standards, storage/handling/transportation rules, fire extinguishing systems, and calculations. It includes 92 tables, 20 original learning illustrations, and 23 worked examples. Bundled learning content can be accessed offline.

4. Flashcards and Memorization

The App provides 584 flashcards, including chemistry terminology and examination guidance cards, and 1,586 fill-in-the-blank items. Review and memorization status may be saved locally to allow continued learning.

5. Formulas, Calculators and Search

The App includes 146 reaction/formula cards and calculators for vapor density, designated-quantity multiples, and ideal-gas volume. Calculations and content search are performed within the App as part of its study features.

6. Incorrect Answers and Learning Progress

The App provides learning progress, quiz accuracy, incorrect-answer review, bookmarks, and continuation of previously read content. These study records are stored locally on the device.

7. Device Permissions

Internet access may be used to load advertisements through Google AdMob. The described core learning features do not require camera, microphone, contacts, or photo-library access. Actual permissions should be checked against the final released build and SDK configuration.

8. Local Data Storage

The App uses shared_preferences for locally retained learning records and settings. Some learning records from earlier versions may be migrated to newer local formats. Uninstalling the App or clearing its storage generally removes local data, although operating-system backup and restoration settings may preserve copies.

9. Third-Party Services

The App integrates Google AdMob for Home-screen banner ads on Android and iOS. Advertising providers may process device and advertising-related information under their own policies.

• Google Privacy Policy: https://policies.google.com/privacy
• Google AdMob: https://support.google.com/admob/answer/6128543

10. Advertising

The App displays a Google AdMob banner at the bottom of its Home screen on Android and iOS. The current project description indicates test advertising IDs, which must be replaced before production advertising is enabled.

Depending on configuration and applicable consent requirements, advertising providers may process IP address, device/app information, advertising identifiers, approximate location inferred from network data, advertisement interactions, and diagnostic information. These advertising communications are separate from offline study content.

11. Analytics and Crash Reporting

The provided project description does not confirm a separate analytics or crash-reporting SDK. Google AdMob and operating-system services may process technical and diagnostic information. This policy should be updated if additional SDKs are introduced.

12. Data Sharing

Core learning features do not require sending learning progress to a Developer-operated server. Advertising providers may receive technical and advertising-related data through their SDKs. We do not sell locally stored learning records.

13. Data Security

Study records are stored on the device. Users should maintain device security and operating-system updates. No storage or transmission method is completely secure. Third-party advertising communications are subject to the providers' security practices.

14. Data Retention and Deletion

Local study records generally remain until the App's storage is cleared or the App is uninstalled, subject to operating-system backups and restoration. Third-party advertising data retention and deletion are governed by the relevant providers' policies and controls.

15. Children's Privacy

The App is intended for people preparing for the Hazardous Materials Industrial Engineer examination and is not specifically directed to children under 13. Its core features do not request personal information through a Developer-operated account service. Advertising settings must reflect the actual target audience and applicable child-privacy requirements.

16. User Choices

Users can manage available study preferences, clear the App's local data through device settings, or uninstall the App. Where supported, users can manage advertising identifiers and ad personalization through their device or Google settings.

17. Changes to This Privacy Policy

We may update this policy to reflect changes to the App, integrated SDKs, applicable law, or app-store requirements. The updated date will be revised accordingly.

18. Contact Us

For questions about this policy or the App's data practices, contact: