What this is
This is the privacy policy for The Body Calculator (“the site”), a collection of health calculators that run entirely in your web browser.
What we collect
Nothing is transmitted from your browser to any server we control.
Calculations happen on your device. Values you enter (weight, blood pressure, lab results, unit preferences) are written to your browser's localStorage under the keys kyn.profile, kyn.bodyUnit, and kyn.labUnit. This storage:
- Stays on the device you used to enter the data
- Never leaves that device
- Persists across reloads until you clear it
- Is not synced or backed up by us
You can erase it at any time by clearing your browser's site data for this domain.
Cookies
The site sets no cookies of its own.
Third-party services
We do not embed analytics, advertising, social-media widgets, third-party fonts, or any other external script. Calculator source lines link to external research databases (PubMed, NEJM, WHO, etc.); clicking those links takes you off this site, and those destinations have their own privacy practices.
Server logs
The web server that delivers these pages keeps standard access logs (timestamp, requested path, response code, requesting IP address). Logs are kept for a short rolling window for debugging and abuse prevention, then discarded. They are not joined with anything you enter into the calculators.
Children's privacy
The site is not directed at children under 13. It does not knowingly collect data from any visitor.
Changes
If we ever add features that change what is collected (for example, analytics or advertising), this page will be updated and the Last updated date at the top will change. Material changes will also be announced on the homepage for at least 30 days.
Contact
Privacy questions: see the Contact page.