Terms of Use

Last updated: October 10, 2026

These Terms of Use ("Terms") govern your access to and use of the RunHUD and OnTrack applications and related services (the "Services") provided by Young J Corp. ("Company," "we," "us," or "our"). By accessing or using our Services, you agree to be bound by these Terms. OGQuick is provided under its own terms of service.

1. Acceptance of Terms

By downloading, installing, or using our Services, you acknowledge that you have read, understood, and agree to be bound by these Terms and our Privacy Policy. If you do not agree, you must not use the Services.

2. Description of Services

RunHUD is a mobile application that displays real-time running metrics from Bluetooth-connected sensors. OnTrack is a mobile interval training timer for runners. Both applications are available on iOS and Android platforms.

3. Accounts

RunHUD premium features require signing in with a Google or Apple account. OnTrack does not use accounts. You are responsible for maintaining the security of the Google or Apple account you use to sign in and for all activities that occur under it.

4. Acceptable Use

You agree not to:

• Use the Services for any unlawful purpose or in violation of any applicable laws
• Reverse engineer, decompile, or disassemble any part of the Services
• Interfere with or disrupt the Services or servers connected to the Services
• Attempt to gain unauthorized access to any part of the Services
• Use the Services to transmit harmful code, malware, or any destructive content
• Resell, sublicense, or redistribute the Services without our written consent

5. Third-Party Services

Purchases are processed by the Apple App Store and Google Play, and RunHUD sign-in is provided by Google and Apple. Your use of these services is subject to their respective terms and policies. We are not responsible for the practices or content of third-party services.

6. Intellectual Property

All content, features, and functionality of the Services — including but not limited to design, code, text, graphics, and logos — are the exclusive property of Young J Corp. and are protected by applicable intellectual property laws.

7. Disclaimer of Warranties

The Services are provided "as is" and "as available" without warranties of any kind, whether express or implied. We do not guarantee that the Services will be uninterrupted, error-free, or free of harmful components. Fitness data displayed by the Services is for informational purposes only and should not be considered medical advice.

8. Limitation of Liability

To the fullest extent permitted by law, Young J Corp. shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising out of or related to your use of the Services, even if we have been advised of the possibility of such damages.

9. Termination

We reserve the right to suspend or terminate your access to the Services at any time, with or without notice, for conduct that we believe violates these Terms or is harmful to other users or our business interests.

10. Governing Law

These Terms shall be governed by and construed in accordance with the laws of the Republic of Korea, without regard to its conflict of law provisions.

11. Changes to Terms

We reserve the right to modify these Terms at any time. Material changes will be communicated through the Services or on this page. Continued use of the Services after changes constitutes acceptance of the revised Terms.

12. Contact

For questions about these Terms, please contact us:

Young J Corp.
A-B314, 646-2 Dongtan-daero, Hwaseong-si, Gyeonggi-do, 18467, Republic of Korea
Email: ask@planhub.kr