Privacy Policy
Your privacy matters. SleepCycle Calc is designed to be a lightweight, privacy-friendly tool. The sleep calculator runs entirely in your browser — the times you enter are processed on your device and are not sent to or stored on our servers.
Information we do not collect
- We do not require you to create an account.
- We do not store the wake-up or bed times you type into the calculator.
- We do not ask for your name, email, or location to use the calculator.
Analytics
We may use privacy-friendly analytics to understand aggregate traffic (for example, how many people visit a page). This helps us improve the site. We do not use this to build personal profiles or sell data to third parties.
Cookies
The core calculator does not require cookies. Third-party services (such as an advertising partner or analytics provider) may set cookies or use similar technologies. You can control or disable cookies through your browser settings.
Affiliate links and third parties
When you click an affiliate link, you leave this site and are subject to the third-party retailer's own privacy policy (for example, Amazon's Privacy Notice). We are not responsible for the privacy practices of external sites. See our Affiliate Disclosure for details on how affiliate links work.
Advertising
If we display ads (such as via an ad network), the ad provider may use cookies to serve relevant ads. You can opt out of personalized advertising through your browser settings or via the ad provider's opt-out tools.
Children's privacy
SleepCycle Calc is not directed at children under 13, and we do not knowingly collect information from children.
Changes to this policy
We may update this policy from time to time. The "last updated" date above reflects the most recent revision.