Cookie Policy
Last updated: March 12, 2026
1. What Are Cookies
Cookies are small text files stored on your device when you visit a website. They help the site remember your preferences and improve your experience.
2. Cookies We Use
Sleep Calc & Sleep Music uses only essential and functional cookies — no advertising or analytics cookies.
| Type | Purpose | Duration |
|---|---|---|
| Essential | Theme setting (dark mode) | 1 year |
| Functional | Sound mixer preferences, timer settings | Session |
3. No Tracking Cookies
Sleep Calc & Sleep Music does not use advertising cookies, analytics cookies, or cross-site tracking cookies. We do not collect, sell, or share any user data.
4. Managing Cookies
You can control cookies through your browser settings. Most browsers allow you to:
- View and delete existing cookies
- Block all or specific cookies
- Set preferences for certain websites
Disabling essential cookies may affect site functionality such as theme preferences.
5. Local Storage
We use browser local storage to save your preferences (such as sound mixer volume levels). This data stays entirely on your device and is never transmitted to any server.
6. Updates
This cookie policy may be updated periodically. Please check back for the latest information on our cookie practices.