한국어 · English

Changogiji Privacy Policy

Effective: July 12, 2026 (revised) · First effective July 11, 2026

The Changogiji Operator—Hans (the “Operator”) provides Changogiji (the “Service”), values your privacy, and complies with applicable laws, including the Personal Information Protection Act of the Republic of Korea. This policy explains what information the Service collects, why, and how it is protected.

This English page is provided for convenience. If there is any discrepancy between the Korean and English versions, the Korean version prevails.

1. Information We Collect and How

The Service has no sign-up process and does not collect direct identifiers such as your name or contact details. To run the game and operate the Service, the following information is collected or generated automatically.

Category	Items	How Collected
Game user key	Apps in Toss version: a hashed identifier based on the game-specific user key issued by Toss (`getUserKeyForGame`). Store versions (Google Play/App Store): an identifier based on the player ID issued by Google Play Games or Apple Game Center when you sign in, or a randomly generated on-device identifier if you do not sign in. None of these include direct identifiers such as your name or phone number.	Generated automatically on first launch or platform sign-in
Game progress data	Cleared levels and star ratings (progress), in-game currency balances (undo/hint counts), invite-reward status, platform tag (toss/android/ios)	Saved automatically during play
Play events	Level play/clear event records (for level statistics)	Recorded automatically during play
Usage analytics events	Interaction event names such as screen views and taps (no personal data or identifiers) — Apps in Toss version only	Collected automatically via Toss analytics
Advertising identifier	Store versions only: to serve ads, the Google AdMob SDK may access your device’s advertising identifier (Android ADID / iOS IDFA). The Service requests non-personalized ads (NPA) only and does not use personalized ads that track you.	Handled automatically by the SDK when ads are shown
Error diagnostics	JavaScript error logs, device/browser environment at the time of the error, and the hashed game user key above	Sent automatically when an error occurs

2. Purposes of Collection and Use

Saving game progress (levels, currency, stars) and restoring it after device change or reinstall
Improving level difficulty and analyzing statistics (based on play/clear events)
Analyzing service usage and improving usability
Diagnosing errors/outages and improving service quality and stability
Providing leaderboard rankings (when signed in to a platform game service)
Operating the free service through advertising (store versions: Google AdMob non-personalized ads / Apps in Toss version: after future business registration)

3. Retention and Deletion

Collected information is retained until the purpose of collection is fulfilled or the Service is discontinued, and is destroyed without delay thereafter.
Error diagnostics are automatically deleted after 90 days per the retention policy of our error-monitoring tool (Sentry).
Upon your deletion request, progress data linked to your game user key is destroyed.
Electronic records are deleted using methods that make recovery impossible.

4. Processing Delegation (Processors)

The Service delegates the following processing tasks for smooth operation.

Processor	Delegated Task	Data Location
Supabase, Inc.	Storing and hosting game progress data (database)	Republic of Korea (Seoul region, `ap-northeast-2`)
Functional Software, Inc. (Sentry)	Error/outage diagnostics and monitoring	United States
Viva Republica Inc. (Toss)	User key issuance, usage analytics, leaderboards, and other platform features — Apps in Toss version only	Republic of Korea
Google LLC	Ad serving (AdMob, non-personalized) and Google Play Games sign-in — store versions only	United States and other Google-operated regions
Apple Inc.	Game Center sign-in and leaderboards — App Store version only	United States and other Apple-operated regions

5. Cross-Border Transfers

The Service transfers personal information abroad (as processing delegation) as follows.

Recipient: Functional Software, Inc. (Sentry) — Country: United States / Items: JavaScript error logs, device/browser environment, hashed game user key / Purpose: error diagnostics and quality improvement / Retention: per retention policy (90 days)
Recipient: Google LLC — store versions only — Country: United States and other Google-operated regions / Items: advertising identifier (for non-personalized ad requests) / Purpose: ad serving / Retention: per Google’s privacy policy
Recipient: Apple Inc. — App Store version, when signed in to Game Center — Country: United States and other Apple-operated regions / Items: Game Center player ID / Purpose: sign-in and leaderboards / Retention: per Apple’s policy

All other game progress data (Supabase) is stored in the Republic of Korea (Seoul region) and is not transferred abroad.

6. Your Rights and How to Exercise Them

You may request access to, correction of, deletion of, or suspension of processing of your personal information.
Since the Service does not collect direct identifiers, requests are handled based on your game user key.
You may exercise these rights via the “Privacy Officer” contact below; the Service will act without delay.

7. Security Measures

Database access control and row-level security (RLS)
Encryption in transit (HTTPS/TLS)
Unnecessary personally identifiable information (PII) disabled in error diagnostics

8. Privacy Officer

Privacy Officer: Changogiji Operator—Hans
Contact (email): hanstown.support@gmail.com

You may direct privacy-related inquiries, complaints, or requests for remedy arising from your use of the Service to the contact above.

9. Notice of Changes

If this policy is added to, deleted from, or amended, we will give notice at least 7 days before the change takes effect, via in-service notice or this page.

Announced: July 12, 2026 (first announced July 11, 2026)
Effective: July 12, 2026 — clauses related to the store versions (Google Play/App Store) apply from the launch date of those versions.