Privacy Policy

Last updated: May 2026

Welcome to ZZZCalc.com. This Privacy Policy explains how we collect, use, and protect information when you visit our website. We are committed to protecting your privacy and being transparent about our data practices.

1. Information We Collect

ZZZCalc.com is a free sleep calculator tool. We collect minimal data to operate the site and improve your experience.

Information you provide: ZZZCalc does not require you to create an account or submit personal information to use the sleep calculator. All calculations happen directly in your browser.

Information collected automatically: When you visit our site, we may automatically collect:

• Your browser type and version
• Pages you visit on our site
• Time and date of your visit
• Referring website (how you found us)
• General geographic location (country/region level only)

2. How We Use Your Information

We use the information we collect to:

• Operate and improve ZZZCalc.com
• Understand how visitors use our site
• Monitor site performance and fix technical issues
• Display relevant advertisements through Google AdSense
• Comply with legal obligations

3. Google AdSense and Advertising

ZZZCalc.com uses Google AdSense to display advertisements. Google AdSense may use cookies and web beacons to serve ads based on your prior visits to our site and other sites on the internet.

Google's use of advertising cookies enables it and its partners to serve ads based on your visit to our site and other sites on the internet. You may opt out of personalised advertising by visiting Google Ads Settings.

For more information on how Google collects and uses data, please visit Google's Privacy Policy.

4. Cookies

Cookies are small text files stored on your device when you visit a website. ZZZCalc.com uses cookies for the following purposes:

• Analytics cookies: To understand how visitors interact with our site (via Google Analytics)
• Advertising cookies: To display relevant ads through Google AdSense
• Functional cookies: To remember your preferences and improve your experience

You can control cookies through your browser settings. Disabling cookies may affect the functionality of some parts of our site.

5. Google Analytics

We use Google Analytics to analyse traffic and usage patterns on ZZZCalc.com. Google Analytics collects information such as how often users visit the site, what pages they visit, and what other sites they used prior to arriving. We use this information to improve ZZZCalc.com.

Google Analytics collects only the IP address assigned to you on the date you visit our site, not your name or other identifying information. We do not combine the information collected through Google Analytics with personally identifiable information.

6. Affiliate Links

ZZZCalc.com participates in the Amazon Associates Programme. Some links on our site are affiliate links, which means we may earn a small commission if you click through and make a purchase — at no extra cost to you.

We only recommend products we genuinely believe may be helpful to our visitors. All affiliate relationships are disclosed where applicable.

7. Third-Party Links

Our site may contain links to third-party websites. We are not responsible for the privacy practices or content of those sites. We encourage you to review the privacy policies of any third-party sites you visit.

8. Data Retention

We retain analytics data for up to 26 months. We do not store personal information beyond what is necessary to operate the site and comply with legal obligations.

9. Children's Privacy

ZZZCalc.com 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 us with personal information, please contact us and we will take steps to delete that information.

10. Your Rights

Depending on your location, you may have the following rights regarding your personal data:

• The right to access information we hold about you
• The right to request correction of inaccurate data
• The right to request deletion of your data
• The right to opt out of personalised advertising
• The right to lodge a complaint with a supervisory authority

If you are located in the European Economic Area or United Kingdom, you have additional rights under GDPR and UK GDPR respectively.

11. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of any significant changes by updating the date at the top of this page. Continued use of ZZZCalc.com after changes constitutes acceptance of the updated policy.