Legal
Cookies
Last updated 8 October 2026.
Pages, fonts and tools are served from our own domain, and the calculators run entirely in your browser without storing your inputs. Analytics and advertising cookies are only set if you accept them in the cookie banner. If you decline, or ignore the banner, none of the cookies below are set.
Cookies we use with your consent
| Cookie | Provider | Purpose | Duration |
|---|---|---|---|
| _ga, _ga_* | Google Analytics 4 | Counts visits and shows which pages and enquiries are used, in aggregate | Up to 2 years |
| _fbp, _fbc | Meta Pixel | Measures the results of our ads on Facebook and Instagram | Up to 90 days |
Your choice is stored in your browser (local storage, key roi-consent) so we do not ask again on every page. You can change it at any time: change cookie settings.
Third parties
Links to WhatsApp and other sites take you to services with their own cookie policies.