Cookie Policy

Version 2026-10 · effective from 1 November 2026

This is an English translation for convenience. The Czech version is legally binding.

Cookies are small files a browser stores for a particular website. The browser’s local storage (localStorage) works similarly. Here is everything the our* family websites and applications store.

Essential

The service does not work without them; they need no consent.

namewherepurposeduration
session cookie (PHPSESSID)all applications after sign-inkeeps you signed in30 days from last activity
REMEMBERMEourApps, ourCISsign-in without entering the password30 days
ourcad_jwtourCADsign-inuntil sign-out or sign-in expiry
ourcad_oauth_state, ourcad_oauth_idpourCADprotection during sign-inminutes, only while signing in
ourcad_guestourCADpreview without sign-in — so you can return to your previewfor the duration of the preview
our_consent_v1 (localStorage)all websitesyour choice in the cookie baruntil you change or delete it
language and appearance (lang, theme, localStorage)applicationsremembering language and light or dark modeuntil you delete them

Analytics — with consent only, ourCAD only

ourCAD can send anonymous usage telemetry: which tools are used, how long computations take and error counts. No identity is sent, IP addresses are not stored and document content never. The data serve only to improve ourCAD and are stored on our servers as aggregate numbers.

Nothing is sent without consent. The other applications do not collect analytics, so they do not ask for consent — they only inform about essential cookies.

Advertising and tracking

We use no third-party advertising or tracking cookies.

Changing your choice

In ourCAD you can change your choice at any time in Settings → Privacy. You can also delete cookies and stored choices in your browser settings — the bar will then appear again; deleting the session cookie signs you out.