Privacy policy
Last updated: 28 October 2026
Who is responsible
Emil Gulamov
Balababa Mejidov 22
1009 Baku, Azerbaijan
Email: emil@gulamoff.dev
The short version
Stukko has no accounts, no ads and no cookies. Every calculation runs in your browser. What you type into a calculator is never sent to us.
Hosting
The site is served by Cloudflare, Inc. (101 Townsend St, San Francisco, CA 94107, USA). To deliver pages and protect the site from abuse, Cloudflare processes technical data of each request, such as your IP address, the page requested, the time, and your browser’s user agent. The legal basis is our legitimate interest in running a secure, working website (Art. 6(1)(f) GDPR). Cloudflare is certified under the EU–US Data Privacy Framework. See Cloudflare’s privacy policy.
Visitor statistics
We use Cloudflare Web Analytics to count visits. It sets no cookies, uses no local storage and does not fingerprint your device. It records the page visited, the referring page, browser and device type and an approximate country, and shows us only totals. The legal basis is our legitimate interest in knowing which calculators are used (Art. 6(1)(f) GDPR).
Stored on your device
The site saves a few things in your browser’s local storage so they are there next time: your last inputs in each calculator and your light or dark theme choice. A service worker keeps a copy of the site so it works offline. None of this is sent to us or anyone else. You can delete it at any time by clearing the site data in your browser.
If you email us, we use your address and message only to reply, and delete them once the matter is settled (Art. 6(1)(b) and (f) GDPR).
Your rights
You have the right to access, correct and delete your personal data, to restrict or object to its processing, and to data portability (Art. 15–21 GDPR). Write to the email address above. You can also complain to a data protection supervisory authority, for example the one in your country of residence.