Cookie Policy (EU)
Last updated: October 31, 2026.
This site uses a small number of cookies — mainly to understand which articles and tools are actually useful. No ads, no third-party tracking networks beyond the one analytics tool listed below, and no cookies are set until you accept the banner.
What we set
| Cookie | Set by | Purpose | Duration |
|---|---|---|---|
te-cookie-consent | Us (localStorage, not a cookie) | Remembers whether you accepted or declined analytics, so we don't ask again every visit. | Until you clear your browser storage |
_ga, _ga_* | Google Analytics | Counts visits and page views anonymously, so we know what's worth writing more of. Only set after you click Accept. | Up to 2 years |
Nothing else — no advertising cookies, no social media pixels, no cross-site tracking.
We also use Cloudflare Web Analytics to count page views. It sets no cookies, stores nothing in your browser and doesn't identify or follow you across sites, so it isn't part of the banner choice.
What's not a cookie, even though it's stored locally
The free tools on this hub (worksheets, labs, calculators) save your inputs in your browser's local storage so you don't lose your work on refresh. That's not a cookie — it never leaves your device, we never see it, and it isn't covered by the banner because it's strictly necessary for the tool you're actively using.
Your choice
When you first visit, a banner asks whether to enable Google Analytics. Choosing Decline means we set nothing beyond the one local flag that remembers your choice. You can change your mind at any time by clearing your browser's site data for this domain — the banner will reappear.
Third party
Google Analytics is provided by Google. See Google's Privacy Policy for how it handles this data. IP addresses are anonymized before we ever see any report. Cloudflare Web Analytics is provided by Cloudflare; see Cloudflare's Privacy Policy.
See also our Privacy Policy and Terms and Conditions.