Last Updated: January 19, 2026

Sleep Calculator

, we take your privacy seriously. This Privacy Policy explains how we collect, use, and protect your information when you use our web application.

1. Information We Collect

Our application is designed to function primarily as a local tool. Most of the data you interact with stays on your device.

Local Storage: When you use the Sleep Tracker, your sleep logs are stored locally on your device using a technology called 'Local Storage'. This data never leaves your browser and is not sent to our servers.
Anonymous Usage Data: We do not track individual users. We may collect anonymous, aggregated data to improve the performance and user experience of our application.

2. How We Use Your Information

We use the local data strictly for the features of the application:

To calculate sleep cycles and suggest bedtimes/wake times.
To maintain your personal sleep history for your own review.

3. Data Protection

Since your sleep logs are stored locally, you have complete control over them. You can clear your browser's local storage or cache at any time to delete all your sleep tracking history.

4. Third-Party Services

Our website may contain links to external sites. We are not responsible for the privacy practices or content of these third-party websites. We encourage you to read their privacy policies when you visit them.

5. Changes to This Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last Updated" date at the top.

6. Contact Us

If you have any questions about this Privacy Policy, please feel free to reach out to us through our contact channels.