Privacy Policy

The short version

FreeAcoustics.tools has no accounts, no ads and no newsletter. We use Google Analytics to see which tools get used. Nothing you type into a calculator is ever sent to us. This page lists every outside company your browser contacts when you load this site, and why.

Analytics

Every page loads Google Analytics 4. It records that a page was viewed, the approximate location the visit came from (Google derives this from the IP address and does not pass the address on to us), the device and browser type, and a small number of interaction events — for example, that a calculator was used, or that a link off the site was clicked. It sets two cookies, _ga and _ga_<id>, to recognise a returning browser.

Google Analytics is also set to record scrolling, outbound clicks, site search, video engagement, file downloads and the fact that a form was interacted with. That last one records that a form was used, not what was typed in it.

Two things it is deliberately not set up to do. Google Signals — the setting that links activity to signed-in Google accounts across devices and feeds ads personalisation — is turned off. And no advertising or remarketing audiences are built from this data.

Analytics data is deleted after 14 months. We look at it in aggregate to see which tools are worth improving. We do not try to identify individuals, and the reports we get do not let us.

Fonts

Typefaces are served from Google Fonts (fonts.googleapis.com and fonts.gstatic.com). Your browser requests them directly from Google, so Google receives your IP address and user-agent when a page loads. Google states it does not use Google Fonts requests to build advertising profiles. No cookies are set by this.

Things kept in your browser

One thing, and it is your light/dark preference — stored under theme in your browser's local storage so the site opens the way you left it. Nothing else is kept. It stays on your device, is never transmitted to us, and clearing your browser data removes it.

What we do not do

• No accounts, no signups, no newsletters.
• No advertising networks, no remarketing, no ad cookies.
• We do not sell, rent or share personal information.
• No profiling, and nothing here is used to make decisions about you.
• Nothing you enter into a calculator is transmitted to us. Links to Buy Me a Coffee are ordinary links — nothing from it loads until you click one.

Opting out

To exclude yourself from analytics, use Google's opt-out browser add-on, or block analytics with any content blocker — every tool on this site works normally with analytics blocked, because the measurement code is separate from the calculators. Clearing cookies for freeacoustics.tools removes the analytics cookies.

Your rights

We hold no account and no profile for you, so in most cases there is nothing to look up. If you have sent us feedback with an email address and want it deleted, email us and we will remove it. For the analytics data, the opt-out and cookie clearing above are the practical controls, and everything expires after 14 months.

Children

These are general-purpose reference tools, not aimed at children, and we do not knowingly collect information from anyone under 13.

Changes

If what we collect changes, this page changes with it and the date below moves. There is no mailing list to notify, by design.

Questions

Email hello@freetools.network.

Last updated 31 July 2026.