Privacy Policy

Last updated: 2026-05-03

1. What This Privacy Policy Covers

This Privacy Policy explains how Caffeine Half-Life Tracker ("we", "us", or "our") handles information when you visit caffeine-half-life-tracker.hub2.day (the "Site"). The Site is a focused web utility that helps you visualize when caffeine may stop affecting your sleep based on your intake time and personal sensitivity. We are committed to transparency and minimizing data collection.

2. Information You Provide Directly

Tool Inputs. The Site operates entirely in your browser. When you enter your caffeine intake time, amount, and sensitivity level, that information stays on your device. We do not collect, transmit, or store your caffeine consumption details, sleep schedules, or sensitivity selections on any server.

Contact Email. If you choose to reach out to us at [email protected], we will receive your email address and any information you include in your message. We use this only to respond to your inquiry and do not add you to marketing lists or share your contact details with third parties for their own purposes.

3. Information Collected Automatically

Server & Security Logs. Like most websites, our hosting infrastructure may automatically log technical details such as your IP address, browser type, referring page, and timestamp when you access the Site. These logs are used solely for security monitoring, troubleshooting, and ensuring the Site remains available. Log data is retained for a limited period and is not combined with any personal caffeine-tracking inputs.

Cookies & Local Storage. The core caffeine visualization tool does not use cookies or browser local storage to remember your inputs. However, our advertising partner and consent management platform may set cookies or access local storage as described below.

4. Advertising and Google AdSense

We use Google AdSense in "auto" mode to display advertisements on the Site. Google AdSense and its partners may use cookies and similar technologies to serve ads based on your prior visits to this Site or other websites.

We do not control the cookies or tracking technologies used by Google AdSense or its partners. Their data practices are governed by Google's own privacy policy.

5. GDPR, EEA, and UK Consent

If you are located in the European Economic Area (EEA) or the United Kingdom, we respect your data protection rights under the GDPR and UK GDPR. Before non-essential cookies (such as those used for personalized advertising) are placed on your device, you will be presented with a consent banner where you can accept or manage your preferences. You may withdraw consent at any time by clearing your browser cookies and reloading the Site to re-trigger the consent prompt. The legal bases we rely on include consent (for advertising cookies) and legitimate interests (for essential security logs and delivering the core tool functionality).

6. CCPA/CPRA-Style Choices

If you are a California resident, you may have rights under the California Consumer Privacy Act (CCPA) as amended by the CPRA. Because we do not sell personal information or share it for cross-context behavioral advertising in a way that would constitute a "sale" or "sharing" under California law, and because we do not collect sensitive personal information for inferring characteristics, the core tool requires no opt-out mechanism. To exercise any applicable rights regarding the limited contact or log data we may hold, please email [email protected] with the subject line "CCPA Request." We will verify your identity before processing your request.

7. Service Providers

We engage a limited set of service providers to operate the Site, including a web hosting provider and Google AdSense for advertising. These providers are contractually obligated to process data only on our instructions and in compliance with applicable data protection laws.

8. Data Retention

Server and security logs are retained for a maximum of 30 days, after which they are automatically purged. Email correspondence is retained only as long as necessary to address your inquiry and for reasonable internal record-keeping.

9. Children's Privacy

The Site is not directed to individuals under the age of 16, and we do not knowingly collect personal information from children. If you believe a child has provided us with personal data, please contact us so we can delete it.

10. Security

We implement reasonable technical and organizational measures to protect the limited information we process. However, no method of transmission over the Internet or electronic storage is 100% secure, and we cannot guarantee absolute security.

11. Third-Party Links

The Site may contain links to external resources or advertisements that lead 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 services you visit.

12. International Data Transfers

Our hosting infrastructure and service providers may process data in countries outside your own. When such transfers occur, we ensure appropriate safeguards are in place as required by applicable law, such as standard contractual clauses.

13. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. The "Last updated" date at the top will reflect the most recent changes. Continued use of the Site after changes are posted constitutes acceptance of the revised policy.

14. Contact Us

For privacy-related questions or to exercise your data protection rights, please contact us at [email protected].