Cookie Policy
Last updated: August 25, 2026
Short version: CalcoTools sets exactly one first-party cookie, for region detection. Google AdSense, our advertising vendor, may set its own — only if you consent.
| Cookie | Set by | Purpose | Duration |
|---|---|---|---|
calcotools-geo-country |
CalcoTools (first-party) | Detects your country (via Cloudflare's edge network, not a tracking script) to show the right currency, date, and unit formatting by default | 24 hours |
No session cookies, no tracking cookies, no analytics cookies. The region cookie above is "strictly necessary" functional processing — the same category as a language-preference cookie — and isn't gated behind the consent banner below, the same way a currency default isn't advertising. Google AdSense, integrated as this site's advertising vendor, may set its own cookies (such as the DoubleClick cookie) to serve and, if you consent, personalize ads — see "The cookie-preference banner," below, and the Privacy Policy's Advertising section for what that involves.
Why there's a cookie-preference banner
You'll see a cookie-preference banner on your first visit, provided by FlexyConsent, our consent management platform (a certified partner in Google's CMP Partner Program, integrated with the IAB's Transparency and Consent Framework — see the Privacy Policy for why that certification matters for EEA/UK/Switzerland visitors specifically). It governs your consent for advertising cookies. Your choice defaults to declined and is remembered locally in your browser; you can change it any time via the small preferences button FlexyConsent adds to the page (usually a circular icon near the bottom-left corner) — changing it takes effect immediately for future ad requests.
Technically, your choice is published via the IAB's standard Transparency and Consent Framework signal (window.__tcfapi) — every purpose starts with no consent recorded, and only becomes granted once you actively accept, which any TCF-aware ad request (including Google's) reads directly. Separately, and more directly, the site's own ad-slot code checks that same resolved signal itself before ever requesting an ad — so declining blocks ad personalization through two independent mechanisms, not just one.
What CalcoTools uses instead of cookies, for everything else
Beyond the one region-detection cookie above, a small amount of state persists in your browser's local storage so features like "recently used tools," a manually-chosen region override, and your cookie choice work:
- All of it stays on your device. None of it is a browser cookie, and none of it is visible to us or to other visitors — see the Privacy Policy for exactly what's stored and why.
Third-party services
Two tools call external services directly from your browser — the Currency Converter (live exchange rates) and the Image to Text / OCR tool (downloads its recognition engine, not your images, from a CDN). Those third-party services may have their own cookie practices, which this policy does not cover — check their respective privacy policies if you have concerns.
As with the other policy documents, have this reviewed by a lawyer before publishing, and revisit it immediately if you add any cookie-based feature (login sessions, ad networks, analytics platforms, etc.) in the future.