Privacy Policy

Summary (Plain English)

We respect your privacy and have designed Target Heart Rate Calculator with privacy as a priority. Here's the short version:

  • We don't collect your personal data. No accounts, no registration, no sign-ups required.
  • All calculations happen in your browser. Your age, heart rate values, and calculation results never leave your device.
  • Nothing is stored on our servers. We have no database of user health information because we simply don't collect it.
  • The calculator works offline. Once the page loads, it functions without any server communication.

Read on for more details about specific aspects of our privacy practices.

Information We Don't Collect

Unlike many websites, we have intentionally chosen not to collect personal information. Specifically:

  • No account required: You don't need to create an account, provide an email address, or register in any way to use our calculator.
  • No health data stored: Your age, resting heart rate, calculated maximum heart rate, and training zone results are processed entirely in your web browser using JavaScript. This data is never transmitted to our servers.
  • No tracking of calculations: We don't track what values you enter or what results you receive. Each session is completely private.
  • No personal profiles: We don't build profiles about you or your fitness level based on your calculator usage.

Information That May Be Collected

While we don't collect personal data through the calculator itself, some information may be collected through standard web technologies:

Analytics: We may use privacy-respecting analytics to understand basic usage patterns such as page views, approximate geographic region (country level), device type (mobile vs. desktop), and browser type. This information is aggregated and anonymous—we cannot identify individual users from this data. Analytics help us understand which features are most used and how to improve the site.

Server Logs: Like most websites, our hosting provider (Vercel) automatically collects standard server logs that may include IP addresses, browser user agents, and pages visited. These logs are used for security monitoring and troubleshooting and are retained for a limited period according to the hosting provider's policies.

Contact via Email

If you choose to contact us via email, the information you provide (your email address and message content) is used solely to respond to your inquiry. We do not share this data with third parties, use it for marketing, or retain it beyond what is necessary to address your request.

Third-Party Services

Target Heart Rate Calculator uses the following third-party services:

Vercel (Hosting): Our website is hosted on Vercel's infrastructure. Vercel may collect standard server logs as described above. You can review Vercel's Privacy Policy for more information.

We do not use advertising networks, and we do not sell or share your data with data brokers or marketing companies.

Cookies

Target Heart Rate Calculator uses minimal cookies:

  • Essential cookies: Our hosting provider may set cookies necessary for the website to function properly, including security-related cookies.
  • No tracking cookies: We do not use cookies to track you across websites or build advertising profiles.
  • No third-party advertising cookies: We don't display ads and therefore don't use advertising cookies.

Most browsers allow you to control cookies through their settings. Blocking cookies should not affect the calculator's functionality since all calculations happen in JavaScript without requiring cookies.

Your Rights

Because we don't collect personal data through the calculator, there's typically nothing to request access to or delete. However:

  • You can clear your browser's local storage and cookies at any time through your browser settings.
  • You can use browser privacy features like incognito/private mode when using our calculator.

If you have any questions about your data or wish to exercise any privacy rights, please contact us.

Children's Privacy

Target Heart Rate Calculator is intended for general audiences and is not directed at children under 13 years of age. 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 via email, please contact us and we will delete that information.

Changes to This Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or for other operational, legal, or regulatory reasons. When we make changes, we will update the "Last Updated" date at the bottom of this page. We encourage you to review this policy periodically.

For significant changes that materially affect how we handle personal information, we will provide more prominent notice (such as a notice on our homepage).

Contact Us

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

Email: info@targetheartratecalculator.org

You can also reach us through our contact form.

Last Updated: January 2026