Cookie Policy
Effective July 9, 2026.
This page explains the cookies and similar technologies (local storage, IndexedDB) MaterialCalc.io uses. For the wider privacy picture, see our Privacy Policy.
What is a cookie?
A cookie is a small text file a site can store in your browser. Cookies help sites remember you (so you stay signed in), measure how the site is used, and personalise experience.
The categories we use
Essential (always on)
| Name | Purpose | Duration |
|---|---|---|
sb-*-auth-token | Keeps you signed in (Supabase auth) | Session / up to 1 year |
mc_consent_v1 | Stores your cookie choice so we don't ask again | 1 year |
mc_unit_system | Remembers imperial vs metric preference | 1 year |
These are required to run the site. They are set on the "essential" legal basis and cannot be disabled without breaking sign-in or your preferences.
Analytics (opt-in)
| Name | Provider | Purpose | Duration |
|---|---|---|---|
_ga, _ga_* | Google Analytics 4 | Anonymous, aggregated page-view and session data with IP anonymisation and advertising signals disabled | 2 years |
Loaded only after you accept analytics in the banner. Reject or clear consent to prevent them being set.
Marketing / advertising (opt-in)
We do not currently run advertising cookies. If we ever add advertising partners (e.g. Google AdSense), we will update this page and ask for explicit consent first.
Do Not Track & Global Privacy Control
The site respects your consent choice above. If you send a Global Privacy Control (GPC) signal we treat it as a signal to reject non-essential cookies.
Manage your choices
Current status: no choice yet.
Change your mind at any time. The banner will reappear so you can pick again.
Contact
Questions about cookies? Email privacy@materialcalc.io.