Privacy Policy
Effective date: April 19, 2026
This Privacy Policy describes how SleepTimingGuide.com ("we," "us," or "our") collects, uses, and shares information when you use our website. By using the site, you agree to the practices described in this policy.
1. Information We Collect
Calculator inputs: The values you enter into the sleep cycle calculator (such as wake time, bedtime, or nap start time) are processed entirely within your browser. This information is never transmitted to our servers or any third party.
Usage data: We use Google Analytics 4 (GA4) to collect anonymized information about how visitors use the site. This may include page views, session duration, device type, browser type, operating system, approximate geographic region (country/city level), and referral sources. This data is aggregated and does not identify you personally.
Advertising data: We display advertisements through Google AdSense. Google and its advertising partners may collect information about your visits to this and other websites to serve relevant ads. See Section 4 below for more detail.
2. Google Analytics
We use Google Analytics 4 to understand how visitors interact with SleepTimingGuide.com. Google Analytics collects anonymized usage data including page views, events, session counts, device information, and general location data. Google Analytics uses cookies to distinguish users and sessions.
Google's data collection and use is governed by the Google Privacy Policy. You can opt out of Google Analytics tracking by installing the Google Analytics Opt-out Browser Add-on.
3. Google AdSense and Advertising
We use Google AdSense to display third-party advertisements on this site. Google AdSense uses cookies — including the DoubleClick cookie — to serve ads based on your prior visits to this and other websites. These cookies allow Google and its partners to serve ads relevant to your interests.
You can opt out of personalized advertising by visiting Google's Ad Settings or the Digital Advertising Alliance opt-out page.
4. Cookies
Cookies are small text files placed on your device by websites you visit. They are widely used to make websites work, to remember your preferences, and to provide information to website owners.
SleepTimingGuide.com uses cookies in the following ways:
- Analytics cookies (Google Analytics): Used to collect anonymized usage data as described above.
- Advertising cookies (Google AdSense / DoubleClick): Used by Google and advertising partners to serve relevant ads and measure ad performance.
- Functional cookies: We store your cookie consent preference in your browser's local storage to remember your choice.
You can disable or delete cookies at any time through your browser settings. Note that disabling cookies may affect the functionality of some features on this or other websites. For instructions, consult your browser's help documentation.
5. Your GDPR Rights
If you are located in the European Economic Area (EEA), United Kingdom, or Switzerland, you have the following rights under the General Data Protection Regulation (GDPR) and applicable local laws:
- Right to access: You have the right to request a copy of the personal data we hold about you.
- Right to rectification: You have the right to request correction of inaccurate personal data.
- Right to erasure: You have the right to request deletion of your personal data under certain conditions.
- Right to restrict processing: You have the right to request that we limit the processing of your personal data.
- Right to data portability: You have the right to receive your personal data in a structured, machine-readable format.
- Right to object: You have the right to object to processing of your personal data for certain purposes, including direct marketing.
To exercise any of these rights, contact us at contact@sleeptimingguide.com. We will respond within 30 days.
6. Your CCPA Rights (California Residents)
If you are a California resident, you have the following rights under the California Consumer Privacy Act (CCPA):
- Right to know: You have the right to request information about the categories and specific pieces of personal information we have collected about you.
- Right to delete: You have the right to request deletion of personal information we have collected from you.
- Right to opt out of sale: We do not sell your personal information to third parties. Google Analytics and Google AdSense may process data under their own terms, but we do not receive payment in exchange for your personal data.
To submit a CCPA request, email us at contact@sleeptimingguide.com with "CCPA Request" in the subject line.
7. Children's Privacy (COPPA)
SleepTimingGuide.com is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13. If you believe we have inadvertently collected information from a child under 13, please contact us at contact@sleeptimingguide.com and we will promptly delete it.
8. Data Retention
We do not store calculator inputs on our servers — all calculations occur locally in your browser. Analytics data collected via Google Analytics is retained according to Google's default data retention settings, which you can review in Google's documentation. You may request deletion of any data associated with your use of this site by contacting us.
9. Third-Party Links
This 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.
10. Changes to This Policy
We may update this Privacy Policy from time to time. When we do, we will update the effective date at the top of this page. Continued use of the site after any changes constitutes your acceptance of the revised policy. We encourage you to review this page periodically.
11. Contact
For privacy inquiries, data requests, or questions about this policy, contact us at: