Privacy Policy
Last updated: May 11, 2026
The short version
Health Hub does not collect, store, or share your personal data. Every calculation runs inside your browser. Nothing you type ever leaves your device.
Information We Do Not Collect
Health Hub is a client-side calculator tool. We do not:
- Ask you to create an account or provide your name, email, or any personal details
- Store your height, weight, age, or any health data you enter into the calculators
- Transmit your inputs to any server — all calculations happen locally in your browser
- Use form submissions, databases, or any backend that could retain your data
When you close your browser tab, your inputs are gone. We have no record of them.
Cookies and Local Storage
The only data stored on your device is your dark mode preference (light or dark theme), saved to localStorage under the key hh-theme. This is a purely cosmetic preference with no personal data and no expiry date. It is never shared with anyone.
We do not set any tracking cookies. We do not use session cookies for login or authentication, because there is no account system.
Google AdSense and Analytics
This site uses Google AdSense to display advertisements and Google Analytics (GA4) to understand aggregate usage patterns such as which calculators are most popular. These are third-party services operated by Google.
Google’s advertising and analytics services may use cookies and similar tracking technologies to serve relevant ads and measure site traffic. Google’s use of advertising cookies enables it and its partners to serve ads based on your visit to this site and other sites on the internet.
You can opt out of personalised advertising by visiting Google’s Ad Settings. You can also opt out of Google Analytics by installing the Google Analytics Opt-out Browser Add-on.
For full details, see Google’s Privacy Policy.
Affiliate Links
Some calculator results on this site include links to third-party products and services (such as Noom, MyFitnessPal Premium, Hims / Hers, and Care/of). These are affiliate links — if you click one and make a purchase, Health Hub may earn a commission at no extra cost to you.
Affiliate links are clearly labelled “Sponsored” and use the rel="nofollow sponsored" attribute. Our recommendations are based on relevance to the calculator result, not commission rates.
Third-Party Links
This site contains links to external websites (including affiliate partners and reference sources). We are not responsible for the privacy practices or content of those sites. We encourage you to read the privacy policy of any third-party site you visit.
Children’s Privacy
Health Hub is a general-audience tool and is not directed at children under the age of 13. We do not knowingly collect personal information from children. If you believe a child has provided personal information through this site, please contact us and we will take appropriate steps.
Changes to This Policy
If we make material changes to this privacy policy, we will update the “Last updated” date at the top of this page. Because we collect no personal data, changes are unlikely to affect your privacy in practice. Continued use of the site after any changes constitutes acceptance of the updated policy.
Contact
If you have any questions about this privacy policy, please reach out: