Privacy Policy & Client-Side Data Protection

At Lifespan Clock (lifespanclock.app), we believe that personal health metrics, demographic profiles, and self-quantification data should remain strictly confidential and entirely under user control. Our entire technical platform is architected to process 100% of calculations locally within your web browser.

1. Strict Client-Side Processing Architecture

Unlike conventional web applications that send form responses to backend servers for database entry, Lifespan Clock operates purely client-side. When you adjust input variables—such as age, biological sex, smoking history, physical exercise frequency, sleep architecture, stress levels, or underlying conditions—all mathematical logic executes locally inside JavaScript runtime memory.

Clicking "Calculate Lifespan" triggers zero HTTP network requests carrying your individual data. Your personal inputs never cross the internet to external cloud storage or remote servers.

2. Zero Personal Identifiable Information (PII) Collection

We enforce a complete zero-telemetry policy regarding personal health indicators:

  • No User Registration: We do not require usernames, passwords, email sign-ups, or personal accounts to use any calculator tool.
  • No Session Tracking: We do not associate health input profiles with browser cookies or IP addresses.
  • No Data Monetization: We never sell, lease, share, or broker health input metrics to third-party advertisers, insurance providers, or data brokers.

3. Local Storage & Functional Cookies

Lifespan Clock utilizes minimal local web storage mechanisms exclusively to enhance user functionality:

  • Theme State: Storing your preferred dark mode or light mode appearance selection in localStorage.
  • Service Worker Cache: Storing core application assets (HTML shells, CSS stylesheets, JavaScript bundles, icons) to support offline Progressive Web App (PWA) functionality.
  • No Tracking Pixels: We do not deploy cross-site tracking pixels, device fingerprinting scripts, or invasive behavioral telemetry.

4. Server Infrastructure & Technical Security

Lifespan Clock is deployed on high-performance static edge infrastructure (Vercel / Netlify). Standard server access logs maintain anonymous infrastructure-level HTTP metadata (such as page path requests and response codes) strictly for platform security, DDoS mitigation, and reliability monitoring.

5. Global Privacy Compliance Standards

Because Lifespan Clock does not transmit, store, or process personal data on remote servers, our architecture naturally aligns with global regulatory standards including the General Data Protection Regulation (GDPR), California Consumer Privacy Act (CCPA), and Health Insurance Portability and Accountability Act (HIPAA) privacy guidelines.

6. Local Storage Management & Browser Cache Clearing

Since all input selections and local settings remain strictly within your local browser storage, you retain absolute authority to delete this data at any moment. Clearing your browser's local cache or clearing site storage for lifespanclock.app instantly purges all saved theme preferences and cached progressive web app files.

7. Direct Inquiries & Data Rights Assistance

If you have technical questions regarding our zero-telemetry architecture, browser memory isolation, or client-side execution security, please contact Vishal Vij (Founder & Lead Developer) directly at contact@lifespanclock.app. We welcome technical feedback from security researchers and privacy advocates.