Privacy Policy

Last updated: March 23, 2026

What we collect

This calculator does not require account creation and does not intentionally collect personal data from your sleep-time input fields.

How the calculator works

Sleep cycle calculations are processed in your browser. We do not store your wake-up times in a database.

Advertising and cookies

We may display ads using Google AdSense and other advertising partners. These vendors may use cookies and similar technologies to serve personalized or non-personalized ads, measure ad performance, and improve service quality.

You can manage ad personalization in your Google ad settings and control cookies through your browser settings.

Third-party services

Hosting providers, analytics tools, and advertising platforms may log technical data such as IP address, browser type, and timestamps for security and performance reasons.

Policy updates

We may update this Privacy Policy from time to time. Continued use of this site after an update means you accept the revised policy.

Contact

If you have privacy questions, use the contact details on the Contact page.