Privacy Policy

Service name: Classroom Trial · Effective date: September 1, 2026

Classroom Trial (the "Service") values your privacy and complies with applicable laws, including the Personal Information Protection Act (Korea). This policy explains what information the Service handles.

1. Personal Information We Collect

The Service does not collect any personally identifiable information.
There is no sign-up or login. We do not ask for, or send to any server, information such as your name, contact details, email, location, photos, or address book.

1-2. Anonymous Usage Statistics

To improve the Service, we send anonymous usage statistics to our server. These include only: a random device number generated the first time you launch the app (it is deleted when you uninstall the app and cannot identify you); the platform (Android, iOS, or web) and app version; and event records such as "how many chapters were started, which trial you got stuck on, whether you opened an ad or hint, and which ending you reached." We do not send your name, contact details, email, location, or advertising ID.

In addition, to confirm that you watched a rewarded ad to the end (server-side verification), the same anonymous device number and a temporary ad-verification code are exchanged between Google AdMob and our server. This code cannot be used to identify you.

2. Information Stored on Your Device

Game progress (scenes read, evidence collected, trial progress, retry waiting time)
Option settings (sound, notifications, text size and speed, whether to show tutorials)
Record of tutorials already viewed

This information is stored only on your device (in the app or browser) and is not sent to the operator. You can delete it at any time by using "Clear saved data" in the Options menu or by uninstalling the app.

3. Advertising

The Service may offer rewarded ads that you choose to watch (for example, to open a hint or skip a retry wait). Ad providers (for example, Google AdMob) may collect and use advertising IDs, device information, and ad usage records under their own policies in order to serve ads and prevent fraud. The operator does not receive this information.

Ads are optional. You can enjoy the entire story without watching any.
You can reset your advertising ID or opt out of personalized ads in your device settings.
In the European Economic Area (EEA), the United Kingdom, and Switzerland, Google's consent message (UMP) is shown the first time you open the app. You can change your choice at any time under "Ad privacy settings" in Options.
Google's privacy policy: policies.google.com/privacy

4. Notifications

Only if you allow it, the Service displays an on-device notification such as "The trial has reopened." We do not collect any additional personal information for notifications, and you can turn them off at any time in the Options menu.

5. Retention and Deletion

The operator holds no personal information. Information stored on your device is removed when you delete it yourself or uninstall the app.

6. Children and Teenagers

The Service does not collect personal information from children under 14. Because the story contains fictional scenes that evoke school violence and drugs, we recommend the Service for users aged 12 and over.

7. Your Rights

You can delete the information stored on your device directly from the Options menu.
You can turn off notifications in the Options menu or your device settings.
You can change ad-related settings in your device (Android/iOS) settings.

8. Contact

For questions about personal information, please contact us below.
Operator: imeji (이메지)
Email: imejikr@gmail.com

9. Changes to This Policy

If this policy changes, we will notify you on the Service screen and on this page at least 7 days before the change takes effect.