Terms of Use

Last updated June 9, 2026

By using this site you agree to these simple terms.

Informational use only

The calculators and guides on this site are provided for general informational and educational purposes. Results are estimates. Nothing here is medical advice. The sleep-cycle model is an average; if you have ongoing sleep problems, see a doctor.

No warranty

We work hard to keep the formulas correct and show them openly, but the site is provided “as is,” without warranty of any kind. We are not liable for decisions made based on a result — always verify anything important before acting on it.

Outbound links

Shopping links on this site are plain search links — we have no affiliate relationships (see our Privacy page). Prices and product availability are set by the retailer, not by us.

Contact

Questions about these terms? Email [email protected].