Terms of Service

1. Acceptance of Terms

These Terms of Service ("Terms") constitute a legally binding agreement between you ("User," "you," or "your") and vupku ("we," "us," or "our") concerning your use of the vupku website and calculator services (collectively, the "Service").

2. Description of Service

vupku provides online calculators and tools across multiple categories including:

• Financial calculators and planning tools
• Health and medical calculation tools
• Mathematical and scientific calculators
• Construction and engineering calculators
• Time, date, and conversion tools
• Educational content and resources

3. User Eligibility and Registration

You must be at least 13 years old to use our Service. If you are under 18, you must have parental or guardian consent. By using our Service, you represent and warrant that you meet these age requirements and have the authority to enter into these Terms.

4. Acceptable Use Policy

Prohibited activities include, but are not limited to:

• Attempting to reverse engineer, decompile, or hack our calculators
• Using automated scripts or bots to access our Service
• Attempting to overwhelm our servers with excessive requests
• Using our Service for illegal activities or fraud
• Copying, distributing, or modifying our content without permission
• Interfering with other users' access to the Service

5. Intellectual Property Rights

All content, features, and functionality of the Service, including but not limited to text, graphics, logos, icons, software, and calculator algorithms, are the exclusive property of vupku or its licensors and are protected by copyright, trademark, and other intellectual property laws.

5.1 Limited License

We grant you a limited, non-exclusive, non-transferable license to access and use our Service for its intended purposes. This license does not include the right to download, copy, modify, or distribute our content or calculators.

6. Privacy and Data Protection

Your privacy is important to us. Our collection and use of personal information is governed by our Privacy Policy, which is incorporated into these Terms by reference. Key privacy principles include:

• Calculator data is processed locally and not stored on our servers
• We collect minimal personal information
• We use cookies for functionality and analytics
• We do not sell or share personal information with third parties for marketing

7. Disclaimers and Limitations

We disclaim all warranties, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, and non-infringement. We do not guarantee that our Service will be uninterrupted, error-free, or completely secure.

8. Limitation of Liability

To the maximum extent permitted by law, vupku shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including but not limited to loss of profits, data, or use, incurred by you or any third party, whether in an action in contract or tort, even if we have been advised of the possibility of such damages.

9. Indemnification

You agree to defend, indemnify, and hold harmless vupku and its officers, directors, employees, and agents from and against any claims, damages, obligations, losses, liabilities, costs, or debt arising from your use of the Service or violation of these Terms.

10. Service Availability and Modifications

We reserve the right to modify, suspend, or discontinue the Service (or any part thereof) at any time with or without notice. We may also impose limits on certain features or restrict access to parts or all of the Service without notice or liability.

11. Third-Party Links and Content

Our Service may contain links to third-party websites or services. We do not endorse or assume responsibility for any third-party content, products, or services. Your use of third-party services is subject to their respective terms and policies.

12. Termination

We may terminate or suspend your access to the Service immediately, without prior notice or liability, for any reason, including if you breach these Terms. Upon termination, your right to use the Service will cease immediately.

13. Governing Law

These Terms shall be governed by and construed in accordance with the laws of the jurisdiction where vupku operates, without regard to conflict of law provisions. Any disputes arising from these Terms or your use of the Service shall be resolved through binding arbitration or in the courts of competent jurisdiction.

14. Changes to Terms

We reserve the right to modify these Terms at any time. We will notify you of any material changes by posting the new Terms on this page and updating the "Last updated" date. Your continued use of the Service after such changes constitutes acceptance of the new Terms.

15. Severability

If any provision of these Terms is held to be invalid or unenforceable, the remaining provisions will remain in full force and effect. The invalid or unenforceable provision will be replaced with a valid provision that most closely matches the intent of the original provision.

16. Contact Information

If you have any questions about these Terms of Service, please contact us: