Privacy Policy

1. Information We Collect

Sleep Calc & Sleep Music is a fully client-side tool. All sleep calculations, sound mixing, breathing exercises, and caffeine tracking are performed locally in your browser. We do not collect, store, or transmit any personal data, health information, or usage inputs to our servers. There are no user accounts or login systems.

2. Cookies & Local Storage

We use minimal local storage for:

• Theme settings (dark mode)
• Basic site functionality

These are strictly functional and do not track you across websites. We do not use advertising or tracking cookies.

3. Third-Party Services

Our site loads fonts from Google Fonts. Please refer to Google's Privacy Policy for information on how they handle data related to font delivery.

4. Data Security

Since all calculations and tools run entirely in your browser, your data never leaves your device. We use HTTPS for all connections.

5. Children's Privacy

Sleep Calc & Sleep Music is a general-purpose educational tool. We do not collect any personal information from any user, including children.

6. Changes to This Policy

We may update this policy from time to time. Changes will be posted on this page with an updated revision date.