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Privacy Policy

Effective date: 2026-09-30 · Version 1.5

This is a translation provided for convenience. If there is any discrepancy between this translation and the Korean version, the Korean version prevails. Korean version (한국어)

Cubing (the "Service") is a mobile app for iOS and Android operated by Jinhwa Jung, an individual (the "Operator"). The Operator complies with the Personal Information Protection Act of the Republic of Korea and other applicable laws, and processes users' personal information as described below.

1. Personal Information We Collect

CategoryItemsWhen collected
Account informationEmail address and profile identifier of your Google or Apple accountWhen you sign in with Google or Apple
Profile informationNickname, country (optional)When you set up your profile
Game recordsSolve records, match results, rating, progressWhile you use the Service
Friends featureFriend list, friendly match invitation records
The Service does not offer a feature for users to write their own messages (chat); the only content exchanged is match invitations generated by the Service
When you add a friend or request a friendly match
Report recordsIdentifiers of the reporting account and the reported account, reason for the report, the reported user’s nickname at the time of the report, dates and times of the report and its handling, outcomeWhen you report another user
Block listIdentifiers of the blocking account and the blocked account, date and time of the blockWhen you block another user
WCA integrationWCA (World Cube Association) ID, real name registered with the WCA, profile image URL
Collected only if you choose to link your WCA account, and deleted immediately when you unlink it
When you link your WCA account
Payment informationPurchased item, payment amount, payment time, store transaction identifier
We do not collect payment method information such as card numbers — this is handled by the App Store and Google Play
When you make an in-app purchase
Advertising identifierDevice identifier processed by the advertising SDKWhen you watch a rewarded ad
Pre-registrationEmail addressWhen you pre-register for launch notifications on the introduction site (withcube.arachat.cc)
Automatically collectedService usage statistics (Google Analytics) — screen views and feature usage events, device and browser information, approximate location estimated from IP address
This data is not sent together with account information and does not identify individuals
While you use the Service

If you do not sign in, your game data is stored only in the app's storage on your device and is not sent to our servers.

2. Purposes of Use

3. Retention Period

When you delete your account, all personal information stored on our servers, including account information, profile, and game records, is destroyed without delay. You can delete your account yourself in the app under Settings → Delete account.

Report records and block lists are also destroyed when an account is deleted; if either the account that reported or blocked, or the account it targeted, is deleted, the related records are destroyed. Audit records of actions the Operator takes, such as handling reports, are disconnected from the account when it is deleted and kept in a form that cannot identify any individual.

Pre-registration email addresses are destroyed without delay after the launch notification has been sent. If you would like yours deleted before then, please send a request to the contact below and we will delete it immediately.

4. Entrustment and Cross-Border Transfer of Personal Information

To provide the Service, the Operator entrusts the processing of personal information as follows.

TrusteeEntrusted task
Supabase Inc.Operation of database and authentication infrastructure (storage of accounts, profiles, game records, payment records, report records, block lists, and pre-registration email addresses)
Google LLCGoogle sign-in (OAuth), service usage statistics analysis (Google Analytics), rewarded ad serving (Google AdMob), Google Play in-app payment processing and receipt verification
Apple Inc.Apple sign-in, App Store in-app payment processing and receipt verification
Cloudflare, Inc.Hosting of the introduction site (withcube.arachat.cc)
GitHub, Inc.Public hosting of the Privacy Policy, Terms of Service, and Customer Support pages (GitHub Pages); retrieving publicly available competition records by WCA ID (a community mirror of WCA public data)
World Cube Association (WCA)WCA account linking (OAuth), if you choose it

Because the trustees above are located outside Korea or process personal information on servers outside Korea, we disclose the following cross-border transfers under Article 28-8 of the Personal Information Protection Act. All transfers take place from time to time over information and communications networks (encrypted connections) while you use the Service.

Recipient (country)Items transferredPurpose of useRetention and use period
Supabase Inc.
Singapore
Account information, profile information, game records, friends feature information, WCA integration information, payment information, report records, block list, pre-registration email addressData storage and authenticationUntil the account is deleted (pre-registration email addresses are destroyed after the launch notification is sent)
Google LLC
United States
Google account email address and identifier (when you sign in with Google), service usage statistics, advertising identifier, Google Play payment informationSign-in, usage statistics analysis, ad serving, payment processingUntil the purpose of the entrustment is achieved or until the account is deleted
Service usage statistics are kept for up to 14 months under the Google Analytics data retention settings
Apple Inc.
United States
Apple account email address and identifier (when you sign in with Apple), App Store payment receiptsSign-in, payment processing and receipt verificationUntil the purpose of the entrustment is achieved
Cloudflare, Inc.
United States
Access logs of the introduction site (IP address, etc.)Site hostingAs set out in Cloudflare's privacy policy
Cloudflare Privacy Policy
GitHub, Inc.
United States
Document access logs (IP address, etc.), WCA ID when retrieving competition recordsDocument hosting, retrieving competition recordsAs set out in GitHub's privacy statement
GitHub Privacy Statement
World Cube Association (WCA)
United States
Authentication information when linking your WCA accountWCA account linkingUntil you unlink your account

Privacy contacts of the recipients — Supabase Inc.: privacy@supabase.com · Google LLC: privacy inquiry form · Apple Inc.: privacy inquiry form · Cloudflare, Inc.: privacyquestions@cloudflare.com · GitHub, Inc.: dpo@github.com · World Cube Association: communication@worldcubeassociation.org

If you do not want your personal information transferred abroad, you can refuse as follows. You can use the Service without signing in (as a guest) or choose not to link a WCA account, and if you have already signed in, you can delete your account. In that case, you cannot use online features such as registering records, rankings, matches, and synchronization across devices. You can turn off the collection of service usage statistics (Google Analytics) in the app under Settings → Analytics data collection, and turning it off does not limit your use of the Service. Rewarded ads are not shown unless you choose to watch them, and they are provided as non-personalized ads only (see 6. Advertising).

5. Your Rights

You may access, correct, or delete your personal information at any time. You can change your nickname and country in your profile in the app, and deleting your account deletes all of your data on our servers. You can unblock users in Settings → Blocked users in the app. For any other request, please use the contact below.

You can turn off the collection of service usage statistics (Google Analytics) at any time in the app under Settings → Analytics data collection.

6. Advertising

The Service shows only rewarded ads that you choose to watch; there are no forced interstitial or banner ads. Ads are provided as non-personalized ads only, so we do not show targeted ads based on your interests or behavior, and we do not request app tracking permission (App Tracking Transparency) for that purpose.

7. Protection of Children and Minors

The Service is intended for users aged 14 or older. We do not collect personal information from children under 14, and if it is confirmed that a user is under 14, or if a legal guardian requests it, we delete that information without delay.

In-app purchases are made only through the App Store and Google Play payment systems, and the Service does not access payment method information. If a minor has made a purchase without the consent of a legal guardian, cancellation can be requested under each store's refund policy, and guardians can control purchases in advance using the store's Family Sharing / Ask to Buy and purchase restriction features. For how to make a request, please see the Customer Support page.

8. Chief Privacy Officer and Contact

CategoryDetails
Personal information controllerJinhwa Jung (operator of Cubing, individual)
Chief Privacy OfficerJinhwa Jung
Contactaracube@gmail.com

Please send privacy inquiries and requests for access, correction, or deletion to the contact above.

For other inquiries, refunds, and account deletion, please see the Customer Support page.

9. Notice of Changes

If this Policy is changed, we will announce it through an in-app notice starting 7 days before the change takes effect.