Terms of Service

Effective date: September 27, 2026

These Terms govern your use of euiyun.com and the mobile apps provided by Euiyun Kim (the “Operator”). They apply when you use a service. If a service displays separate terms or a software license, those additional terms also apply to that service.

1. Provider and services

Provider: Euiyun Kim / Contact: geniuskey@gmail.com

The services include webpages and browser features on euiyun.com and mobile apps distributed by the Operator. Available features may differ by service and app version.

2. Your responsibilities

You must use the services in accordance with applicable law and these Terms. You must not:

• Use a service for an unlawful purpose or to infringe another person’s rights, reputation, or privacy;
• Interfere with the normal operation, security, or use of a service by others;
• Manipulate scores, leaderboards, or purchases by improper means or gain unauthorized access to a system; or
• Copy, distribute, or modify service content or software without authorization, or reverse engineer it where applicable law does not permit it.

Nothing in this section restricts rights that applicable law gives you.

3. Content and intellectual property

Unless stated otherwise, rights in the services’ design, documentation, graphics, sounds, and software belong to the Operator or the relevant rights holder. You receive a limited, non-transferable right to use the services for personal, non-commercial purposes. A separate license applies to open-source software and other materials that identify one.

4. Third-party services and payments

Some app features use third-party services such as Google Play Games and Google Play Billing. Google’s terms and policies additionally apply to Hexillion’s optional leaderboard and in-app purchases. Payments, cancellations, and refunds follow Google Play’s procedures and applicable law. The Operator does not manage accounts or payment methods held by those providers.

5. Changes and suspension

The Operator may update the services or change or discontinue features for security, maintenance, improvement, or operational reasons. Where practical, changes will be announced on the website or in the app. Access may be restricted as necessary if you violate these Terms or harm a service.

6. Warranties and liability

The Operator works to provide reliable services but, to the extent permitted by law, does not guarantee uninterrupted availability or immediate correction of every error. The Operator is responsible for damages caused by intent or negligence as required by applicable law. These Terms do not exclude liability that cannot legally be limited or any consumer rights protected by law.

7. Privacy

Personal information handled through the services and your related rights are described in the Privacy Policy.

8. Changes to these Terms

The Operator may update these Terms. Changes and their effective date will be posted on this page. Significant changes will also be announced on the service or in the app. If you do not agree to an updated version, you may stop using the service.

9. Governing law and contact

These Terms are governed by the laws of the Republic of Korea. For questions about these Terms, contact Euiyun Kim at geniuskey@gmail.com. Disputes are subject to the procedures and jurisdiction provided by applicable law.