Last updated: October 14, 2026
This Privacy Policy explains how Sleep Calculator ("we", "us") handles information when you use this website (the "Site").
The times you enter into the sleep calculator are processed entirely in your browser. We do not send them to our servers, store them, or link them to you.
Like most websites, our hosting provider may log standard technical data such as IP address, browser type, device type, pages visited and timestamps. This is used for security, troubleshooting and understanding how the Site is used.
The Site itself does not require cookies to work. If we add analytics or advertising services (for example Google Analytics or Google AdSense), those providers may set cookies to measure traffic, personalise content and show ads. You can control or delete cookies in your browser settings.
Third-party vendors, including Google, may use cookies to serve ads based on your prior visits to this and other websites. You can opt out of personalised advertising at google.com/settings/ads. These providers have their own privacy policies, which we do not control.
If you email us, we will use your email address and message only to respond to you.
We use information to operate and improve the Site, keep it secure, analyse usage and respond to enquiries. We do not sell your personal information.
Server logs and analytics data are kept only as long as needed for the purposes above. Emails are kept as long as needed to handle your request.
Depending on where you live (for example under GDPR or CCPA), you may have the right to access, correct, delete or object to the processing of your personal data. Contact us to make a request.
The Site is not directed at children under 13, and we do not knowingly collect personal information from them.
We take reasonable steps to protect information, but no method of transmission over the internet is completely secure.
We may update this policy from time to time. The "Last updated" date above shows the latest revision.
Privacy questions? Please contact us through the contact details provided on this website.