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Privacy Policy

Last updated: July 2026

1. Overview

At Sleep Calculator, accessible from our website, one of our main priorities is the privacy of our visitors. This Privacy Policy document contains types of information that is collected and recorded by Sleep Calculator and how we use it.

2. Local Computation & No Personal Data Collection

Our sleep cycle calculations are performed entirely in your browser using local JavaScript. We do not store, collect, or transmit your sleep schedules, target wake times, or any personally identifiable information to external servers.

3. Cookies and Web Beacons

Sleep Calculator uses standard browser local storage only to remember your preferred settings (such as custom cycle duration and fall-asleep delay). We do not use tracking cookies for profiling or selling personal data to third parties.

4. Third-Party Services & Analytics

We may use aggregated, non-personally identifiable web analytics to monitor overall traffic patterns and improve application performance. Third-party vendors process standard technical logs (such as IP addresses and browser types) in compliance with standard web standards.

5. Consent

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