Privacy Policy

Who publishes this site

fastcalco.com is an independent project maintained by a single developer based in Poland. There is no company behind it, nothing is sold here, and there is no newsletter or user account system. Questions about this policy, corrections to a calculator, and takedown requests all go to contact@fastcalco.com.

What happens to the numbers you type

Every calculator on this site is JavaScript that runs inside your browser. When you enter a salary, a due date, a body weight or a loan amount, that value is used to compute a result on your own device and is discarded when you close the tab.

• Nothing you enter is sent to our servers.
• Nothing you enter is written to a database, a log file or an analytics event.
• Results are not carried between visits — reloading the page clears them.

Two groups of tools reach beyond the page, and only when you ask them to. The camera, microphone and headphone tests request access through your browser's own permission prompt, show the stream back to you locally, and neither record nor transmit it. The placeholder-image tool loads sample images from picsum.photos, which will see your IP address the way any image host does.

Cookies and advertising

This site displays advertising supplied by Google AdSense. That is the one part of the site where information about your visit is processed by someone other than you.

• Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this site or other sites.
• Google's use of advertising cookies enables it and its partners to serve ads to you based on your visit to this site and/or other sites on the internet.
• You may opt out of personalised advertising by visiting Google Ads Settings.
• You may opt out of a third-party vendor's use of cookies for personalised advertising at aboutads.info.

Google describes what it collects from sites that use its services in How Google uses information from sites or apps that use our services.

Your choice about advertising

The advertising script is not loaded until you have made a choice. Until then no advertising cookie is set. Declining leaves every calculator fully working — the only difference is that no ads are shown.

Your choice is remembered in your browser's local storage under the key fastcalco-consent. It is not a cookie and is not readable by anyone else. You can change it at any time using the cookie-settings link in the footer, or by clearing site data in your browser.

Analytics

The site uses Vercel Analytics and Vercel Speed Insights to count page views and measure load times. These record which page was viewed, roughly which country the request came from, and how quickly the page rendered. They do not set advertising cookies and do not follow you across other sites.

Your rights

Because the site holds no accounts and stores nothing you type, there is usually no personal data of yours for us to show, correct or erase. Where the GDPR applies you keep the rights of access, rectification, erasure, restriction, objection and portability over any data that is held, and the right to complain to your national supervisory authority — in Poland, the President of the Personal Data Protection Office.

For data processed by Google as an advertising provider, those rights are exercised through your Google account or the opt-out links above, since that data is held by Google rather than by this site.

Children

This site is not directed at children and does not knowingly collect data from them. The calculators that concern children — due dates, growth percentiles, family benefits — are written for parents and carers.

Changes to this policy

Substantive changes are reflected in the revision date below. Because the site keeps no mailing list, there is no way to notify you of a change; checking this page is the only mechanism.

Contact

Write to contact@fastcalco.com. One person reads that mailbox, so a reply may take a few days, but every message is read.