Cookie Policy
Last updated: 11 August 2026
This Cookie Policy explains how Calculio (https://calculio.co.uk) uses cookies and similar technologies, what each type of cookie does, and how you can manage your preferences. It should be read alongside our Privacy Policy.
What are cookies
Cookies are small text files that a website stores on your device, such as your computer, phone or tablet, when you visit it. They let a site remember things about your visit, such as your preferred settings or how you arrived at the page, so your next visit can be quicker and more useful. Cookies are not viruses and cannot access other files on your device. Some cookies last only for the length of your browsing session, while others stay on your device for longer so a site can recognise you on a return visit. Alongside cookies, similar technologies such as local storage and pixel tags can be used for the same purposes, and we treat them the same way in this policy.
How we use cookies
When you first visit Calculio, a cookie banner asks you to choose which categories of cookies you're happy for us to use. We group cookies into four categories:
- Essential cookies: These are needed for the site to function correctly, including session handling, security and remembering your cookie choice itself. Because the site cannot work properly without them, they cannot be switched off.
- Analytics cookies: These help us understand how visitors use Calculio, such as which calculators are most popular and how people move around the site. We use this information in aggregate to improve the site. These are optional.
- Advertising cookies: These are used by advertising partners, including Google AdSense, to show adverts that are more relevant to you and to measure how well those adverts perform. These are optional.
- Preference cookies: These remember choices you make on the site, such as light or dark mode, so you don't need to set them again on your next visit. These are optional.
No tracking or advertising script loads until you have made a choice in the cookie banner, and analytics or advertising cookies are only set if you accept them.
Why we ask for your consent
Under UK GDPR and the Privacy and Electronic Communications Regulations (PECR), we need your permission before setting any cookie that isn't strictly necessary for the site to run. That's why you'll see the cookie banner the first time you visit Calculio, and why analytics and advertising cookies stay switched off until you actively choose to allow them. You're free to accept all cookies, reject everything except the essential ones, or pick and choose using the preferences panel. Whatever you choose is saved on your device so you shouldn't need to repeat the choice on every visit, though clearing your browser's storage will reset it.
Third-party cookies
Some cookies on Calculio are set by third-party services we use rather than by us directly. These may include Google Analytics, which helps us understand site usage, and Google AdSense, which we intend to use to display adverts once our application has been approved. These third parties may set their own cookies in line with their own privacy and cookie policies, and we don't control how they use the data those cookies collect. You can find out more about Google's approach to cookies and advertising on Google's own policy pages.
Managing cookies
You can change your cookie choices on Calculio at any time using the button below, which reopens the preferences panel shown in the cookie banner.
You can also control or delete cookies through your browser's settings. Most browsers let you see what cookies are stored, delete some or all of them, and block cookies from particular sites or all sites. Since the exact steps differ by browser, check your browser's own help pages for instructions, for example the cookie settings within Chrome, Safari, Firefox or Edge. Bear in mind that blocking essential cookies through your browser may stop some parts of Calculio working as intended, such as remembering your theme or your cookie choice itself.
If you use multiple devices or browsers to visit Calculio, such as a phone and a laptop, you'll need to set your cookie preferences separately on each one, since choices are stored locally on the device and browser you used to make them, not against an account.
Changes to this policy
We may update this Cookie Policy from time to time, for example if we introduce a new analytics or advertising provider. Any changes will be posted on this page with an updated revision date.
Contact us
If you have any questions about how Calculio uses cookies, please get in touch via our contact page or email us at hello@calculio.co.uk.