Privacy Policy

No accounts, no forms

This site does not require accounts or sign-ups, and has no forms that collect personal information like your name or address.

What you type into the calculators

The calculators ask for details such as your age, sex, height, weight, body measurements, resting heart rate, and goal weight. These values are used only inside your browser to work out the result shown on the page. They are never sent to this site or to any third party, they are not stored, and they are not included in the analytics or advertising described below — closing or reloading the page clears them.

Analytics

This site uses Vercel Analytics and Speed Insights to understand aggregate traffic and page performance. These tools do not use cookies and do not track you individually across sites.

This site also uses Google Analytics to understand how visitors use the site. Google Analytics uses cookies to distinguish visitors and collects information such as pages visited, device type, and approximate location. It also receives anonymous usage events from the exercises — for example, that an exercise was started or finished, the score or time achieved, and whether the share or “next exercise” buttons were used. These events are not linked to your name or any account. You can opt out of Google Analytics tracking by installing the Google Analytics Opt-out Browser Add-on.

Advertising

This site may display ads served by Google AdSense. Google and its partners may use cookies or similar technologies to serve ads based on your prior visits to this or other websites. You can opt out of personalized advertising by visiting Google Ads Settings or aboutads.info/choices. To learn more about how Google uses data from sites that show its ads, see How Google uses information from sites or apps that use our services.

Local storage

Exercises and calculators run entirely in your browser. Some information is kept in your browser's local storage so it persists between visits — such as your best reaction times, memory scores, and Schulte table times, how far you have progressed through Mental Math Practice, and how many breathing sessions you have completed. This data stays on your device; the site has no server-side copy of it. You can remove it at any time by clearing this site's data in your browser settings, and Mental Math progress can also be reset from within the exercise.

Sharing results

The “Share result” button uses your device's built-in share sheet, or copies a short message and link to your clipboard. Nothing is posted anywhere unless you choose to send it, and the site does not see what you share or who you share it with.

Links to other websites

Articles on this site link to external websites, such as scientific journals, publishers, and research databases cited as references. Those sites are not operated by Online Human Exercise and have their own privacy policies. This site is not responsible for their content or privacy practices, so please review their policies when you visit them.

Your choices

You can block or delete cookies in your browser settings, opt out of personalized ads and Google Analytics using the links above, and remove anything this site has saved on your device by clearing its site data. Because this site doesn't collect personal information itself, requests about data held by Google are best made through Google's privacy settings. For anything else, contact us using the details below.

Children

This site is for a general audience and is not directed at children under 13. We don't knowingly collect personal information from children. The fitness calculators and nutrition articles are intended for adults.

Contact

Questions about this policy can be sent to doc@onlinehumanexercise.com. See the Contact page for more.

Changes to this policy

If this policy changes, this page will be updated to reflect that.