Privacy policy
How messages and calculator inputs are handled.
Contact: webmaster.jarvis@gmail.com.
Tools and tracking
Calculator entries remain in your browser and are not sent to us or saved by the tools. No analytics or advertising scripts are enabled.
Correspondence
We use your name, email and message to respond to enquiries and corrections, relying on legitimate interests. Avoid sending sensitive information. Routine correspondence is retained for up to 12 months unless an ongoing issue requires longer.
Cloudflare provides hosting and, when configured, security and contact processing. Our email provider processes correspondence. Security services may process IP addresses and request information. Providers may process information outside the UK under applicable safeguards.
Your rights
Email us to request access, correction or deletion, or to object to processing. You may complain to the ICO.
Publisher identification must be completed before public launch. Updated 2026-10-25.