Privacy policy
Last updated: 14 November 2026.
What this site collects
Nothing about you. There are no accounts, no forms and no analytics or advertising scripts. Every calculation runs in your browser: the measurements you type are not sent to us or to anyone else.
What stays on your device
The site remembers one setting, the unit you chose (mm, cm or in), in your browser's local storage under the name tools.unit. It never leaves your device and you can clear it in your browser settings.
Server logs
Like any website, the server that delivers these pages receives the technical data of each request (IP address, time, page and browser type). We use it only to keep the site running and secure.
Links to app stores
Buttons to the App Store and Google Play open those stores; their own privacy policies apply there.
If you write to us, we use your address and message only to answer you.
Contact
Questions about this policy: heyisoft@gmail.com.