Terms of Use

Last Updated: May 31, 2025

1. Acceptance of Terms

By downloading, installing, or using VarCalc (the “App”), you agree to be bound by these Terms of Use (the “Terms”). If you do not agree to these Terms, do not use the App.

2. License to Use

2.1 Grant of License

Subject to these Terms, we grant you a limited, non-exclusive, non-transferable, non-sublicensable license to use the App for personal, non-commercial purposes.

2.2 Restrictions

You may not:

• Reverse engineer, decompile, or disassemble the App
• Copy, modify, or create derivative works of the App
• Sell, rent, lease, or commercially exploit the App
• Bypass or disable any security features of the App
• Use the App for any illegal or unauthorized purpose

3. Intellectual Property

3.1 Ownership

The App and all its content, features, and design are the exclusive property of the developer and are protected by copyright and other intellectual property laws.

3.2 Feedback

Any feedback, suggestions, or ideas you provide may be used by us freely without any obligation to you.

4. Privacy

Our privacy practices are described in our separate Privacy Policy. By using the App, you consent to the practices described in the Privacy Policy.

5. Disclaimers

5.1 “As Is” Basis

The App is provided “as is” and “as available” without warranties of any kind, whether express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement.

5.2 Calculation Accuracy

While we strive to ensure calculation accuracy, we do not guarantee that all calculations will be completely accurate. In particular, due to the nature of floating-point arithmetic, errors may occur with extremely large or small numbers and complex scientific calculations. For critical calculations, we recommend independent verification.

5.3 Service Interruptions

The App may be unavailable due to:

• Technical issues or maintenance
• Problems with your device
• Other circumstances beyond our control

6. Limitation of Liability

To the maximum extent permitted by law, we shall not be liable for:

• Any direct, indirect, incidental, special, consequential, or punitive damages arising from your use or inability to use the App
• Loss of data, loss of profits, or business interruption
• Any malfunction or calculation errors in the App

In no event shall our liability exceed the amount you paid for the App (which is $0 for free apps).

7. Indemnification

You agree to defend, indemnify, and hold us harmless from all claims, damages, and expenses (including reasonable attorneys’ fees) arising from your use of the App, violation of these Terms, or infringement of any third-party rights.

8. Changes to Terms

We reserve the right to modify these Terms at any time. Material changes will be notified within the App. Continued use of the App after changes constitutes acceptance of the modified Terms.

9. Termination

9.1 Termination by You

You may terminate these Terms at any time by uninstalling the App.

9.2 Termination by Us

We may terminate these Terms and suspend your access to the App at any time, for any reason, without prior notice.

9.3 Effect of Termination

Upon termination, provisions relating to intellectual property, disclaimers, limitation of liability, and indemnification shall survive.

10. General Provisions

10.1 Governing Law

These Terms are governed by and construed in accordance with the laws of Japan.

10.2 Dispute Resolution

Any disputes arising from these Terms shall be subject to the exclusive jurisdiction of the Tokyo District Court.

10.3 Severability

If any provision of these Terms is found to be invalid or unenforceable, the remaining provisions shall continue in full force and effect.

10.4 Entire Agreement

These Terms constitute the entire agreement between you and us regarding the use of the App and supersede all prior agreements.

11. Contact Us

For questions about these Terms, please contact us at:

Email: t.nemoto.x@gmail.com

Thank you for reading these Terms of Use.