Privacy Policy

Last updated: August 17, 2026

No account, no server-side calculation storage

Chrona does not require registration. The bedtime, nap, caffeine, and sleep-debt calculators run entirely in your browser using JavaScript — your inputs and results are never transmitted to or stored on our servers.

What is stored locally in your browser

With your consent, Chrona uses your browser's local storage to remember: your recent bedtime/wake-up calculations, your sleep-debt log entries, and your cookie-consent choice. This data stays on your device, is never sent to us, and can be cleared at any time using the "Clear" controls on each tool, or by clearing your browser's site data directly.

Advertising and analytics

This site may display advertising served by Google AdSense and may use Google Analytics to understand aggregate traffic patterns. These third-party services may set cookies or use similar technologies to serve relevant ads and measure performance, in accordance with their own privacy policies. Google's use of advertising cookies enables it and its partners to serve ads based on your visits to this and other sites; you can review or adjust ad personalization at adssettings.google.com, and Google's own data practices are described at policies.google.com/technologies/partner-sites.

If and when advertising is active on this site, this section will be kept current with the specific networks in use.

Contact form data

If you use the contact form, the name, email address, and message you submit are sent directly to our inbox by email to respond to your inquiry. This data is not added to any marketing list and is not sold or shared with third parties.

Your choices

You can decline non-essential local storage via the cookie banner, clear stored data at any time from within each tool, and block cookies entirely through your browser settings (some third-party ad functionality may not work correctly if you do). Depending on your location, you may have additional rights under regulations such as the GDPR or CCPA, including the right to request details about data associated with you.

Questions about this policy: [email protected] or the contact form.