Privacy policy
Data controller
E.O., who publishes Kalkulo as a private individual. Contact for any question about your data: kalkulo2026@gmail.com.
General principle
Calculations run entirely in your browser. The values you type into the tools are never sent to or stored on any server. Kalkulo has no user accounts and no user database.
Data processed — purpose, legal basis, retention
| Data | Purpose | Legal basis | Retention |
|---|---|---|---|
| Region/language preference (localStorage kalkulo-region) | Show the site in the right language | Legitimate interest (Art. 6(1)(f)) | Until you clear it |
| Advertising consent choice (TCF string via Google's CMP: euconsent-v2, FCCDCF…) | Honour and evidence your choice (IAB TCF v2) | Legal obligation (ePrivacy) | Per Google's CMP (~13 months) |
| Google AdSense cookies (__gads, __gpi, IDE…) | Serve ads and measure them | Consent (Art. 6(1)(a)) | Per Google's policy |
| Contact form: name, email, message, IP address | Answer your enquiry and limit spam | Consent / pre-contractual steps (Art. 6(1)(a)/(b)) | 12 months after the last exchange |
Cookies
Non-essential cookies (Google AdSense advertising) are set only after your consent, collected by Google's certified CMP ("Privacy & messaging", IAB TCF v2). You can accept, reject or configure it, and reopen that window at any time via "Manage cookies" in the footer.
| Cookie / storage | Set by | Purpose | Lifetime |
|---|---|---|---|
| kalkulo-region | Kalkulo | Chosen language/region | Persistent (localStorage) |
| euconsent-v2, FCCDCF, FCNEC, __gpp… | Google (CMP "Privacy & messaging") | Stores your consent choice (TCF v2) | Up to ~13 months |
| __gads, __gpi, IDE, test_cookie… | Google (AdSense) | Advertising and measurement | Session to ~13 months |
Recipients and processors
- Google Ireland Ltd / Google LLC — Google AdSense (advertising) and the certified consent management platform (CMP) that collects your choice. Google's policy.
- Cloudflare, Inc. — hosting and CDN. Cloudflare's policy.
- Sendinblue SAS (Brevo) — sends the contact-form emails. Data hosted in the EU. Brevo's policy.
Transfers outside the EU/EEA
Google and Cloudflare may process data in the United States, relying on the EU–US Data Privacy Framework and/or Standard Contractual Clauses. Brevo processes data within the EU.
Your rights
You have the right of access, rectification, erasure, objection, restriction and portability, and the right to withdraw consent at any time("Manage cookies" in the footer, which reopens Google's CMP). Email us at kalkulo2026@gmail.com. You may also lodge a complaint with the ICO (UK).
Withdrawing consent
"Manage cookies" in the footer reopens Google's CMP, where you can withdraw consent; the CMP then stops serving personalised ads. We cannot, from your browser, delete cookies Google has already set — also use Google Ad Settings or clear your browser cookies.
Security
HTTPS everywhere, client-side calculations, no user database.
Minors
The site is not aimed at children under 13 and does not knowingly collect their data.
Changes
This policy is versioned. A significant change may cause Google's CMP to ask for your consent again. Last updated: 2 September 2026.