Cookies
Cookies
Which cookies and browser storage this site uses, and why.
Strictly necessary (no consent needed)
Needed to provide features you ask for, so they work without consent. None of them hold anything that identifies you.
bioon_lead
Lets you open the free resources after entering your email. It holds only an issue time and a signature — no email or name.
Type: Cookie (HttpOnly) · Kept for: 1 year
bioon_analytics_consent
Remembers whether you accepted or declined analytics cookies.
Type: Browser storage · Kept for: Until you clear it
theme
Remembers your dark or light mode choice.
Type: Browser storage · Kept for: Until you clear it
Visit statistics (only with your consent)
Only switched on if you click 'Accept' in the banner. If you decline, Google Analytics isn't even loaded.
_ga
Distinguishes visitors so visits can be counted (Google Analytics).
Type: Cookie (Google) · Kept for: 2 years
_ga_<ID>
Keeps the session state (Google Analytics).
Type: Cookie (Google) · Kept for: 2 years
Changing your choice
Click 'Cookie settings' at the bottom of any page to see the banner again. You can also clear cookies and site data in your browser settings.
Sources
- Google Analytics Help — [GA4] Cookie usage on websites
- ICO — Guidance on the use of storage and access technologies
Last checked: 29 September 2026
