The calculators
Every tool on this site runs entirely in your browser. Salaries, NIFs, rents, dates — whatever you enter is processed on your device and is never sent to, or stored on, any server. Close the page and it's gone.
Visit counting (no cookies)
To know how many people the site reaches we use GoatCounter, an open-source counter that sets no cookies and stores nothing that could identify you — only aggregate numbers: which page was viewed, from which country, on which day. Because it collects no personal data, it runs without asking for consent.
Analytics (only with your consent)
We ask before measuring anything. If you accept, we use Google Analytics 4 to see which pages are visited, from what kind of device and country, and how people find the site. Google Ireland Ltd. processes this on our behalf; data may be transferred to Google LLC in the US under the EU–US Data Privacy Framework. We do not use it for advertising and we do not sell data. If you decline — or simply ignore the banner — no analytics script is loaded at all.
Cookies and local storage
- Without consent: zero cookies. Your consent choice itself is kept in your browser's local storage (key “ga-consent”) so we don't ask again.
- With consent: Google Analytics sets its standard cookies (_ga, _ga_*) to tell returning visitors apart. They expire after at most 2 years.
You can change your mind at any time:
Hosting
The site is hosted by Hostinger (EU). Like virtually all web servers, the hosting infrastructure may keep short-lived technical logs (IP address, requested page) for security and abuse prevention.
Your rights
Under the GDPR you have the right to access, correct, delete and port your personal data, and to object to or restrict its processing. Since this site keeps no user database, in practice this mostly concerns analytics data — you can also clear it by deleting cookies. You can lodge a complaint with the Portuguese supervisory authority, the CNPD (cnpd.pt).
Contact
Questions about privacy or your data: ola@howto.pt.
Last updated: 6 July 2026.