Cookie Notice
Updated August 28, 2026
Plain-language summary
PrismSino uses only first-party cookies needed to keep you signed in, remember language and time-zone choices, manage the free guest trial, and protect free allowance. The random device identifier lasts up to 180 days and is not an invasive fingerprint; explainable risk signals last up to 90 days. You may clear site data or sign out. We do not use advertising cookies or cross-site tracking.
Detailed notice
1. Cookies we use
Necessary cookies maintain the signed-in session, associate the free guest trial, protect free allowance, and remember interface language and account time zone.
2. Why
They provide authentication, work continuity, preferences, and abuse prevention; the random device identifier is not an invasive browser fingerprint and does not build advertising profiles.
3. Retention
Session and guest identifiers last up to 30 days; the free-allowance device identifier up to 180 days; explainable risk signals up to 90 days; preferences up to one year; guest jobs 24 hours; local drafts seven days.
4. Controls
Signing out removes the session cookie. Browser settings can remove cookies and local storage.
5. Advertising
PrismSino does not use advertising cookies, social pixels, or cross-site tracking.
6. Contact
Email [email protected] for cookie or browser-storage questions.
Technical details
prismsino_session: necessary, up to 30 days, HttpOnly, SameSite=Lax, Secure in production;tradelead_sessionis read for migration compatibility.prismsino_guest: necessary, up to 30 days, HttpOnly, SameSite=Lax, Secure in production.prismsino_ui_localeandprismsino-timezone: preferences, up to one year, SameSite=Lax; time zone is Secure in production.- localStorage keeps interface preferences and account-scoped unfinished drafts.