Privacy Policy

SleepingTimeCalculator.com — how we handle your data, cookies, and affiliate relationships

1. Information We Collect

Information you provide directly

Our sleep calculator tools run entirely in your browser. We do not collect, store, or transmit the time values you enter into our calculators. All calculations happen locally on your device.

If you contact us via email, we collect the information you choose to share (name, email address, message content) solely to respond to your inquiry.

Information collected automatically

When you visit our website, we may automatically collect certain information including:

• Browser type and version
• Operating system
• Pages visited and time spent on each page
• Referring website (how you found us)
• General geographic location (country/city level, not precise location)
• Device type (desktop, mobile, tablet)

This information is collected via Google Analytics and is used in aggregate form to understand how visitors use our site so we can improve it. We do not use this data to personally identify you.

2. Cookies

Our website uses cookies — small text files stored on your device. We use the following types:

• Analytics cookies (Google Analytics): Help us understand traffic patterns and page performance. These are anonymized.
• Functional cookies: Remember your preferences (such as theme settings) during your visit.
• Third-party cookies: Amazon and other affiliate partners may set cookies when you click affiliate links. These are governed by their own privacy policies.

You can disable cookies in your browser settings at any time. Disabling cookies will not affect your ability to use our calculators.

3. Affiliate Links & Third Parties

Our website contains affiliate links to Amazon.com and other retailers. When you click these links and make a purchase, we earn a small commission at no extra cost to you.

Amazon: When you click an Amazon affiliate link, Amazon may set cookies on your device. Amazon's privacy practices are governed by the Amazon Privacy Notice. We are a participant in the Amazon Services LLC Associates Program.

We do not share your personal information with affiliate partners. We do not have access to any data Amazon collects about you.

4. Google Services

We use the following Google services:

• Google Analytics: Website traffic analysis. Data is anonymized and aggregated. You can opt out using the Google Analytics Opt-out Browser Add-on.
• Google Fonts: We load fonts from Google's servers. This means Google may receive your IP address when fonts are loaded. See Google's Privacy Policy.
• Google Search Console: Used to monitor our site's search performance. This does not involve collection of your personal data.

5. How We Use Information

We use the information we collect to:

• Operate and improve our website and tools
• Understand which content is most useful to visitors
• Respond to inquiries you send us
• Monitor and fix technical issues
• Comply with legal obligations

We do not sell, rent, or trade your personal information to any third party for marketing purposes.

6. Data Retention

We retain analytics data for up to 26 months as configured in Google Analytics. Email correspondence is retained as long as necessary to resolve your inquiry. We do not store calculator inputs — these exist only in your browser session and are deleted when you close the tab.

7. Your Rights

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

• Access: Request a copy of data we hold about you
• Deletion: Request deletion of your personal data
• Opt-out: Opt out of analytics tracking via browser settings or the Google opt-out tool
• GDPR (EU residents): You have rights under the General Data Protection Regulation including access, rectification, erasure, and portability
• CCPA (California residents): You have the right to know what personal information is collected and to opt out of its sale (we do not sell personal information)

To exercise any of these rights, contact us at: privacy@sleepingtimecalculator.com

8. Children's Privacy

Our website is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal information, please contact us and we will delete it promptly.

9. External Links

Our website contains links to external sites (Amazon, product manufacturers, etc.). We are not responsible for the privacy practices of these sites and encourage you to review their privacy policies before providing any personal information.

10. Changes to This Policy

We may update this Privacy Policy from time to time. We will post the updated policy on this page with a revised "Last updated" date. Continued use of our website after changes constitutes acceptance of the updated policy.

11. Contact Us

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