Cookies & storage

Last updated 20 September 2026

Propbook sets no cookies and loads no advertising or analytics scripts from other companies. That is why you don't see a cookie banner: everything below is either needed for the app to work, a choice you made, or anonymous audience measurement that the law exempts from consent — which you can still switch off.

Like any web app, Propbook keeps a few items in your browser's storage (localStorage, sessionStorage and an offline cache). None of them is shared with another company.

Needed for the app to work

Item	Set by	Purpose	Duration
`sb-…-auth-token`	Propbook (sign-in via Supabase)	Keeps you signed in	Until you sign out
`propbook_v1`	Propbook	Your journal and settings on this device (the only copy in guest mode)	Until you clear it or delete your data
Offline cache (`propbook-v…`)	Propbook service worker	Lets the app open fast and offline	Replaced at each update
`pb_ref`	Propbook	A referral code you typed, until you subscribe	Until used or cleared
`pb_econ`, `pb_sesstz`, `pb-scan-zones`	Propbook	Economic calendar cache, your session time zone, screenshot-scanner settings	Until you clear them

Your preferences

Item	Purpose	Duration
`propbook_theme_v2`, `propbook_palette`, `propbook_side`, `pb_look_v3`	Theme, colours, sidebar and layout you chose	Until you change or clear them
`pb_open`, `pb_newsdismiss`, `pb_pip_last` and similar interface keys	Remember which panels are open, which notices you dismissed, Pip's last review	Until you clear them
`pb_noanalytics`	Remembers that you switched usage statistics off	Until you switch them back on

Anonymous audience measurement

Item	Purpose	Duration
`pb_aid`, `pb_aid_t`	A random identifier (and its creation date) used only to count visits and feature use on Propbook itself. It is never linked to your account, never combined with other data, never shared, and the events it tags contain no trades, P&L or account numbers.	Renewed after 13 months; events deleted after 13 months
`pb_lv`, `pb_ev_…`	Avoid counting the same visit or first-time event twice	End of the browser session / until cleared

This measurement follows the conditions under which the French data protection authority (CNIL) exempts audience measurement from consent. You can still refuse it at any time: Settings → Your data in the app, or the “Usage statistics” link at the bottom of the home page. If your browser sends a Global Privacy Control signal, nothing is collected.

Removing everything

Clearing this site's data in your browser settings removes all of the above. In guest mode, that also erases your journal — export it first from Settings.

Questions: propbookinc@gmail.com. See also our Privacy Policy.