Privacy policy

Information you enter into calculators

Times, ages, sleep hours, dates and cities you enter are processed by JavaScript in your browser. They aren’t sent to SleepCalcHub or stored on our servers. When you close or reload the page, they’re gone.

Information stored on your device

If you use the light/dark switch, your choice is saved in your browser’s local storage under the name sch-theme, so the site remembers it next time. Nothing else is stored. You can clear it at any time through your browser settings.

SleepCalcHub doesn’t show advertising.

Analytics

We use Google Analytics 4 to understand how many people visit the site and which pages are useful. Google Analytics sets cookies (such as _ga) and collects information such as the pages you view, how you arrived at the site, your device and browser type, and your approximate location (city or country). Google does not share your full IP address with us, and we can’t identify you from these reports.

We use this information only to measure and improve the site. We don’t use it for advertising and we don’t combine it with any other information about you. The numbers you enter into the calculators are not sent to Google Analytics.

Google processes this data under its own privacy policy. You can block Google Analytics with your browser’s cookie settings or with Google’s opt-out browser add-on; the calculators work the same either way.

Server logs

SleepCalcHub is hosted by Hostinger. Like most hosting services, it may automatically record basic technical information when a page is requested, such as your IP address, browser type, the page requested and the time. This is used to keep the site running and secure, and is handled under Hostinger’s own privacy policy.

If you email us

If you contact us at hello@sleepcalchub.com, we receive your email address and whatever you include in your message. We use it only to reply and to fix any problem you report, and we delete correspondence when it’s no longer needed. Email to this address is handled by our hosting provider and forwarded to a private mailbox.

Sharing and selling

We don’t sell, rent or share personal information for marketing. We would only disclose information if required by law.

Links to other sites

Our pages link to sources such as public health organisations and research journals. Those sites have their own privacy policies, which apply when you visit them.

Children

The site doesn’t knowingly collect personal information from children. The calculators work without anyone entering personal details.

Your rights

Depending on where you live, you may have the right to ask what personal information we hold about you and to have it corrected or deleted. Email us to make a request.

Changes to this policy

If this policy changes, we’ll update the date at the top of the page.