Cookie Notice

Short version#

This site sets no tracking cookies and no advertising cookies. That is why there is no cookie consent banner — not an oversight, simply nothing to consent to.

Browser storage we do use#

Name	Type	Purpose	Lifetime
precisim_locale	Cookie	Remembers your language choice	1 year
precisim-theme	localStorage	Remembers light/dark preference	Until you clear it
authjs.session-token	Cookie (HttpOnly)	Sign-in session. Only set once you sign in	30 days
authjs.csrf-token	Cookie (HttpOnly)	Cross-site request forgery protection	Session

All of these are either strictly necessary or a preference you chose. None is used for tracking, profiling or advertising.

Analytics#

We use self-hosted Umami:

• no cookies;
• no full IP addresses recorded;
• results are aggregate — page views, referrers, rough region — and cannot be traced to a person;
• the data lives on our own server and is not shared with any analytics platform.

No Google Analytics. No advertising pixels of any kind.

Third-party content#

The home page and documentation embed no third-party resources: the product illustration is inline SVG, typography uses system fonts, and there are no iframes or CDN-hosted scripts.

That is deliberate:

1. a page should never hang because an overseas resource will not load;
2. every third-party resource hands visitor information to a third party — better not to.

Videos are hosted on Bilibili and YouTube, but we link out rather than embedding a player. Once you follow the link, those platforms' own cookie policies apply.

Clearing it#

• Clear site data in your browser;
• language and theme revert to defaults and you will be signed out;
• nothing happens to your account, licences or orders.

Changes#

If we ever introduce a new cookie — a support chat widget, say — we will update this page and add a consent mechanism where one is required. Until then, this page is the whole story.