Privacy Policy
Last updated: July 2026
This Privacy Policy explains how SleepTools ("we", "our", "us") handles information when you use our free online tools, including the Nap Calculator and related utilities. We keep things simple: our tools are designed to work entirely in your browser.
1. What We Collect
Our tools do not require registration and do not store the information you enter. When you use the Nap Calculator or other tools, your inputs (such as times and values) are processed locally in your browser using JavaScript and are not transmitted to our servers.
2. Automatic Information
Like most websites, we may receive standard technical information automatically, including your IP address, browser type, device type, and pages visited. This information is used for security, analytics, and to understand how visitors use our tools.
3. Advertising and Cookies
We display advertising through Google AdSense. Google and its partners use cookies to serve ads based on your prior visits to this website and other websites. You may opt out of personalized advertising by visiting Google's Ads Settings at adssettings.google.com. Our tools themselves do not set cookies.
4. How We Use Information
- To operate, maintain, and improve our tools
- To understand usage patterns and improve page performance
- To serve and measure advertising
- To protect the security of our website
5. Third-Party Services
We may use third-party services (such as Google Analytics or Cloudflare) that process data on our behalf. These services have their own privacy policies. We do not sell your personal information to third parties.
6. Data Retention
Because our tools process inputs in your browser, we do not retain the specific values you enter. Aggregated, anonymized analytics data may be retained for reasonable periods for operational purposes.
7. Children's Privacy
Our tools are general-purpose utilities and are not directed to children under 13. We do not knowingly collect personal information from children.
8. Your Choices
You can control cookies through your browser settings and opt out of personalized ads through Google's Ads Settings. You can contact us at any time to ask questions about this policy.
9. Changes to This Policy
We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated revision date.
10. Contact
If you have questions about this Privacy Policy, please contact us via our contact page.