Privacy Policy — Sleep Cycle Calculator
Effective Date: May 20, 2026
This Privacy Policy applies specifically to the Sleep Cycle Calculator (hosted at https://sleepcycle.altto.org) and all its associated sub-paths. It describes how we collect, handle, and disclose technical traffic data when you utilize our online utility.
1. Data Collected Automatically
Our website does not require user registration, email sign-ups, or login credentials to calculate sleep intervals. We collect no personal, identifying details (such as names, phone coordinates, or physical addresses). However, technical performance logs and browser parameters are automatically processed using persistent third-party partners.
- Google Analytics 4 (GA4): Aggregates technical traffic behavior including device configurations, session timings, and country indicators to help us improve user experience parameters.
- Google AdSense: Serves contextual, localized advertising banners based on user browsing habits.
2. How Technical Data is Used
The technical metadata collected on this micro-site is used exclusively for:
- Analyzing web application performance and identifying mobile screen issues.
- Calculating user retention rates across resources pages.
- Serving high-relevance standard advertising layouts through Google AdSense.
3. Cookie Disclosure Chart
We deploy standard HTTP cookies to support analytics and monetization targets. Here is our cookie specification table:
| Cookie Name | Source Provider | Analytical Purpose | Storage Lifetime |
|---|---|---|---|
| _ga | Google Analytics 4 | Distinguishes unique anonymous user profiles. | 2 Years |
| _gid | Google Analytics 4 | Saves unique user sessions metrics. | 24 Hours |
| IDE / DSID | Google AdSense | Stores user search habits to serve personalized programmatic advertisements. | 1 Year |
4. Your Technical Opt-Out Rights
You carry full technical control over cookie variables. Users can block or delete all site cookies through their individual browser parameters, or opt-out of Google's tracking systems by installing the native Google Analytics Opt-Out Browser Addon.
5. Third-Party Links
This site contains contextual outer hyperlinks pointing to authoritative entities (such as health associations and reference studies). We maintain no control over the privacy conditions established by these outer third-party servers.
6. Contact & Inquiries
For privacy-centric questions regarding the Sleep Cycle Calculator, contact our central webmaster at:
Email of Network: hello [at] altto.org