Privacy Policy

Last updated: April 11, 2026

This Privacy Policy explains how mcgcalc.com (“we”, “us”, “our”) handles information when you use our website and calculators (the “Service”).

1. Our Commitment to Privacy

Your privacy is important to us. mcgcalc.com is designed as a client-side tool — all calculations run entirely in your browser. We do not require account creation, login, or any form of registration to use the Service.

2. Information We Do Not Collect

This is the most important section of this policy. We do not collect, record, or transmit any of the data you enter into our calculators. All peptide quantities, dosages, syringe volumes, and calculation results are processed locally in your browser and never leave your device.

When you save a calculation, it is stored in your browser’s localStorage. This data remains on your device only — it is never sent to our servers or any third party.

3. Information We May Collect

We may use privacy-respecting analytics to understand general usage patterns. This may include:

  • Pages visited and general navigation patterns
  • Browser type and version
  • Device type (desktop, mobile, tablet)
  • General geographic region (country level)
  • Referring website

This data is collected in aggregate and cannot be used to identify you personally. We do not track individual users across sessions.

4. Cookies

The Service may use minimal cookies to support basic site functionality. We do not use advertising cookies or tracking pixels. You can control or delete cookies through your browser settings at any time.

5. Third-Party Services

We do not run ads on the Service. We do not sell, rent, or share your personal information with any third party. If we use analytics services, they are configured to respect user privacy and do not collect personally identifiable information.

6. Local Storage

The Service uses browser localStorage to persist saved calculations and theme preferences. This data is stored entirely on your device and is never transmitted. You can clear this data at any time by:

  • Deleting saved calculations through the Service interface
  • Clearing your browser’s site data or cache

7. Data Security

Since we do not collect or store personal data on our servers, there is minimal risk of data breach from our side. All interactions with the Service occur over HTTPS to ensure data in transit is encrypted.

8. Children’s Privacy

The Service is not intended for anyone under the age of 18. We do not knowingly collect any information from minors.

The Service may contain links to external websites. We are not responsible for the privacy practices or content of those sites. We encourage you to review the privacy policies of any external site you visit.

10. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated “Last updated” date. Continued use of the Service after changes constitutes acceptance of the revised policy.

11. Contact

If you have questions about this Privacy Policy, you can reach us at contact@mcgcalc.com.