Privacy Policy

Last Updated: July 15, 2026

At Lifespan Clock (accessible from lifespanclock.app), one of our main priorities is the privacy of our visitors. This Privacy Policy document outlines the types of information that is processed by the Lifespan Clock and how we manage it.

1. Client-Side Processing Architecture

Unlike standard websites that process search parameters or demographic entries on remote servers, the Lifespan Clock runs entirely client-side.

When you enter your age, region, biological sex, smoking status, exercise habits, diet metrics, sleep schedules, or stress parameters:

  • These inputs are handled by your browser's local JavaScript interpreter.
  • None of these inputs are transmitted to external servers.
  • We do not collect, store, aggregate, or sell your personal health metrics.
  • Your longevity projections are generated locally on your device in real-time.

2. Cookies and Local Storage

We use local storage (cookie caching) to enhance your user experience. If you consent to our cookie usage, the Lifespan Clock saves your selected calculator parameters locally in your browser's localStorage database.

This ensures that when you reload the site, your details remain pre-filled, so you do not have to re-enter them. This information remains private on your computer and can be cleared at any time by emptying your browser's cache or local storage.

3. Third-Party Advertisements (Google AdSense)

We may display third-party advertisements on our website (such as Google AdSense) to support the ongoing hosting of this free tool. Third-party ad networks use technology like cookies, JavaScript, or Web Beacons to serve ads based on a user's prior visits to this website or other sites on the internet.

  • Google's use of advertising cookies enables it and its partners to serve ads to our visitors based on their visit to lifespanclock.app and/or other sites on the Internet.
  • Users may opt out of personalized advertising by visiting Google's Ads Settings.

The Lifespan Clock has no control over or access to these cookies that are used by third-party advertisers. We encourage you to consult the respective Privacy Policies of these third-party ad servers for more detailed information.

4. Children's Information

Another part of our priority is adding protection for children while using the internet. We encourage parents and guardians to observe, participate in, and/or monitor and guide their online activity.

Since all operations run client-side and we do not collect server-side logs of personal inputs, the Lifespan Clock does not knowingly collect any Personal Identifiable Information from children under the age of 13.

5. Consent

By using our website, you hereby consent to our Privacy Policy and agree to its terms.

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