Privacy Policy

What we do not collect

We do not collect, receive, store, transmit, sell or share: any value you enter into a calculator — salaries, weights, loan balances, dates, rates or anything else; the results the calculators produce; your name, email address or payment details (we have no accounts and take no payments); or behavioural profiles of your activity inside a calculator. Every calculation runs in JavaScript on your own device. Because this data never reaches us, we cannot access it, disclose it, lose it in a breach, or be compelled to hand it over. You can confirm this by opening your browser's network tab while you use any calculator: no request is made.

What stays on your device

One preference is kept in your browser's local storage: whether you chose light or dark mode. It never leaves your device, is not readable by us, and disappears when you clear site data. We do not store your inputs, history or favourites, even locally.

Share links

As you change a calculator's inputs, they are written into the page's own address after the # sign — for example …/compound-interest/#principal=25000&years=7 — so you can bookmark that exact calculation or send it to someone with the Share button. That part of an address is never sent to any server, ours or the hosting provider's, when the link is opened; the browser keeps it to itself. The only copy of your numbers is the link, and you decide who sees it.

Information our hosting provider processes

Like every website, this site is served by a hosting and content-delivery provider, which processes the ordinary data needed to deliver a page: your IP address, browser user-agent string, the page requested, the referring page and a timestamp. This is standard server-log data, it is not linked by us to any identity, and it is never combined with anything you type into a calculator. It is retained under the provider's own policy.

Cookies and analytics

calculatormanager.com sets no cookies — no advertising cookies, no cross-site tracking cookies and no analytics cookies. There are no analytics or advertising scripts on the site today. Fonts are served from this site itself, so no third-party font service receives your request. If aggregate, privacy-respecting analytics or advertising are added in future, this page will be updated before they go live and will say precisely what each one receives.

Third parties

We do not sell or share personal information with anyone. The only third party involved in serving this site is the hosting and content-delivery provider described above. Sources cited on calculator pages link to external websites (government agencies, regulators, standards bodies); their privacy policies apply once you follow a link.

Children

This site is not directed at children under 13 (or under 16 where local law sets that age), and we do not knowingly collect information from them — which, given the above, would be difficult in any case.

Your rights

Depending on where you live, laws such as the GDPR and the CCPA may give you rights of access, correction, deletion and portability. Because we receive nothing you enter, there is normally nothing for us to look up, export or delete. For a request concerning hosting-provider log data, contact admin@calculatormanager.com.

International use

Calculator inputs are processed only on your device, so they are not transferred across borders by us. Pages are delivered from the content-delivery location nearest to you.

Changes to this policy

If this policy changes materially, the date at the top of the page changes with it, and a significant change will be noted on the site before it takes effect.

Contact

Questions about this policy: admin@calculatormanager.com, subject line “Privacy enquiry”.