What we do not use
- No advertising or retargeting cookies.
- No third-party analytics cookies that profile individuals across sites.
- No social media tracking pixels.
- No cross-site identifiers, fingerprinting scripts or data-broker tags.
What may be stored on your device
Strictly necessary technical storage may be used by the hosting platform to deliver pages securely and to keep the service available — for example, load-balancing or anti-abuse measures. Under the UK Privacy and Electronic Communications Regulations, strictly necessary storage of this kind does not require prior consent.
Your browser also caches static assets such as stylesheets, scripts and images so that pages load quickly on repeat visits. That is ordinary browser caching, not tracking, and you can clear it at any time from your browser settings.
Calculator values
Values you type into a calculator live in the page's memory only. They are not written to cookies, not written to local storage, and not sent to a server. Refreshing or closing the tab clears them completely.
Controlling storage
Every major browser lets you block or delete cookies and site data from its privacy settings. Because we rely on none of it for functionality, blocking storage for this domain will not break the calculators.
If this changes
If we ever introduce analytics or any non-essential storage, we will publish it here first and implement a genuine consent mechanism with an equally prominent reject option — before any such technology is loaded.
Questions about this page
If anything here is unclear, or you need a specific confirmation in writing, write to us through the contact page and tell us which document and section you are asking about.