Privacy Policy

Last Updated: December 19, 2025

SleepingCalculator.org ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you visit our website.

1. Information We Collect

1.1 Information You Provide Voluntarily

We may collect information that you voluntarily provide when you:

• Subscribe to our email newsletter
• Contact us via email or contact forms
• Submit feedback or reviews
• Participate in surveys or promotions

This information may include your name, email address, and any other information you choose to provide.

1.2 Information Collected Automatically

When you visit our website, we automatically collect certain information about your device and browsing activity, including:

• Log Data: IP address, browser type, operating system, pages viewed, time and date of visit, referring website
• Cookies and Similar Technologies: Small data files stored on your device that help us improve functionality and analyze usage patterns
• Analytics Data: Website usage statistics collected through services like Google Analytics

1.3 Sleep Calculator Data

Important: The sleep calculator operates entirely within your web browser using JavaScript. When you enter sleep times and calculate results:

• No calculation data is sent to our servers
• No sleep times or personal sleep information is collected or stored by us
• All calculations happen locally on your device
• Your sleep data remains completely private to you

2. How We Use Your Information

We use the information we collect to:

• Provide and maintain our services: Operate the website and sleep calculator tool
• Improve user experience: Analyze how visitors use our site to enhance functionality and content
• Communicate with you: Send newsletters, updates, or respond to inquiries (only if you've opted in)
• Detect and prevent issues: Monitor for technical problems, fraud, or security threats
• Comply with legal obligations: Meet legal and regulatory requirements

3. Cookies and Tracking Technologies

3.1 Types of Cookies We Use

• Essential Cookies: Required for website functionality (e.g., remembering your calculator mode preference)
• Analytics Cookies: Help us understand how visitors interact with our site (Google Analytics)
• Advertising Cookies: Used to deliver relevant advertisements if we participate in advertising networks

3.2 Your Cookie Choices

Most web browsers automatically accept cookies, but you can modify your browser settings to decline cookies. Note that disabling cookies may affect website functionality.

To opt out of Google Analytics tracking, visit: Google Analytics Opt-out Browser Add-on

4. Third-Party Services

We may use third-party services that collect, monitor, and analyze information to improve our service:

4.1 Google Analytics

We use Google Analytics to track and report website traffic. Google Analytics uses cookies to collect anonymous information including the number of visitors, pages visited, and traffic sources. This data is used to improve our website and user experience.

Learn more: Google Privacy Policy

4.2 Affiliate Programs

Our website contains affiliate links to third-party products and services. When you click these links and make purchases, we may receive a commission. These third-party services have their own privacy policies, and we are not responsible for their practices.

Affiliate partners may include Amazon Associates and other sleep product retailers.

4.3 Email Service Providers

If you subscribe to our newsletter, your email address is stored and processed by our email service provider (e.g., Mailchimp, ConvertKit). These services comply with applicable data protection laws.

5. How We Share Your Information

We do not sell, trade, or rent your personal information to third parties. We may share information only in the following circumstances:

• Service Providers: Third-party companies that help us operate our website (hosting, analytics, email delivery) under strict confidentiality agreements
• Legal Requirements: When required by law, subpoena, or legal process
• Protection of Rights: To protect our rights, property, or safety, or that of our users or the public
• Business Transfers: In connection with a merger, acquisition, or sale of assets (users would be notified)

6. Data Security

We implement reasonable security measures to protect your information from unauthorized access, alteration, disclosure, or destruction, including:

• SSL/TLS encryption for data transmission
• Secure hosting infrastructure
• Regular security assessments
• Access controls and authentication

However, no method of transmission over the internet is 100% secure. While we strive to protect your information, we cannot guarantee absolute security.

7. Data Retention

We retain your information only for as long as necessary to fulfill the purposes outlined in this Privacy Policy, unless a longer retention period is required by law. Specifically:

• Email Subscribers: Until you unsubscribe or request deletion
• Analytics Data: Typically 26 months (Google Analytics default)
• Log Files: Generally 30-90 days
• Correspondence: As long as necessary to address your inquiry

8. Your Privacy Rights

Depending on your location, you may have certain rights regarding your personal information:

8.1 General Rights

• Access: Request a copy of the personal information we hold about you
• Correction: Request correction of inaccurate or incomplete information
• Deletion: Request deletion of your personal information
• Objection: Object to processing of your information for specific purposes
• Data Portability: Request transfer of your data to another service
• Withdraw Consent: Withdraw consent for data processing (e.g., unsubscribe from emails)

8.2 GDPR Rights (European Users)

If you are located in the European Economic Area (EEA), you have additional rights under the General Data Protection Regulation (GDPR), including the right to lodge a complaint with a supervisory authority.

8.3 CCPA Rights (California Users)

If you are a California resident, you have rights under the California Consumer Privacy Act (CCPA), including:

• Right to know what personal information is collected
• Right to know if personal information is sold or disclosed and to whom
• Right to opt-out of the sale of personal information
• Right to deletion
• Right to non-discrimination for exercising CCPA rights

Note: We do not sell personal information.

CPRA Update (2024): The California Privacy Rights Act (CPRA), which amended the CCPA and took effect in 2023, expanded the opt-out right to include not just the "sale" of personal information but also the "sharing" of it for cross-context behavioral advertising. Under CPRA, California residents can opt out of both the sale and sharing of their personal information.

8.3a Global Privacy Control (GPC)

We honor Global Privacy Control (GPC) signals as required by California law. If your browser or device sends a GPC signal, we will treat it as a valid request to opt out of the sale or sharing of your personal information for that specific browser or device. To learn more about GPC and how to enable it, visit globalprivacycontrol.org.

8.4 How to Exercise Your Rights

To exercise any of these rights, please contact us at: privacy@sleepingcalculator.org

We will respond to your request within 30 days.

9. Children's Privacy

Our website is not intended for children under the age of 13, and we do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe your child has provided us with personal information, please contact us, and we will delete such information.

10. International Data Transfers

Your information may be transferred to and maintained on servers located outside your country of residence. By using our website, you consent to the transfer of information to countries that may have different data protection laws than your country.

11. Do Not Track Signals

Some web browsers have "Do Not Track" (DNT) features. Currently, we do not respond to DNT signals, as there is no industry standard for how to interpret and respond to such signals.

12. Links to Other Websites

Our website contains links to third-party websites, including affiliate product links and recommended resources. We are not responsible for the privacy practices of these external sites. We encourage you to review their privacy policies before providing any information.

13. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or legal requirements. We will notify you of significant changes by:

• Posting the new Privacy Policy on this page with an updated "Last Updated" date
• Sending an email notification if you're subscribed to our newsletter
• Displaying a prominent notice on our website

Your continued use of the website after changes are posted constitutes acceptance of the updated Privacy Policy.

14. Contact Us

If you have questions, concerns, or requests regarding this Privacy Policy or our data practices, please contact us:

We will respond to all requests and inquiries within 30 days.

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By using SleepingCalculator.org, you acknowledge that you have read and understood this Privacy Policy and agree to its terms.