CalcWize is a calculator hub designed to be useful without collecting personal data. This policy explains what stays on your device, what gets sent where, and what we do (and don't do) with anything that touches our servers.
The short version
- We don't have user accounts. We don't ask for your name or email.
- Your calculator inputs live in your browser's
localStorage. They never leave your device — we have no database to send them to. - If you accept the cookie banner, Google AdSense will set its own cookies to serve ads. Decline and you see no ads — every calculator still works.
What we store on your device
CalcWize uses the browser's localStorage (a built-in, per-site storage area) to remember:
- Your calculator inputs (so you can refresh the page without losing your numbers)
- Your chosen currency, theme, and which calculator you last opened
- Whether you turned on Explain mode
- Your cookie-consent decision
All of this stays in your browser. You can wipe it any time via your browser's settings (Settings → Privacy → Clear site data) or by opening DevTools and runninglocalStorage.clear().
What our servers see
CalcWize runs on Cloudflare Workers. Like any web server, the platform sees standard request metadata (IP address, user agent, page requested) for purposes including rate-limiting and abuse prevention. We don't aggregate, sell, or otherwise analyse this data — it's held only as long as Cloudflare's standard logs retain it.
CalcWize does not have any server endpoints that process your calculator inputs. All calculations run entirely in your browser.
Third parties
Google AdSense
CalcWize uses Google AdSense to show ads, which keep the calculators free. The AdSense library is included on the site, but no ad is requested or displayed unless you accept the cookie banner. If you accept, AdSense may set cookies to serve and measure ads, and Google's advertising policies apply — you can opt out of personalised ads at any time via Google Ad Settings. If you decline, no ads are requested, and every calculator still works exactly the same.
Cloudflare (hosting + DNS)
The site is hosted on Cloudflare Workers, with Cloudflare DNS and SSL. Cloudflare may keep brief logs of HTTP requests for security/operational purposes. See Cloudflare's privacy policy.
Children
CalcWize is not directed at children under 13 (or under 16 in the EEA), and we don't knowingly collect data from them. If you believe a minor has used the site and you want their device's data wiped, clear the browser's site data — there's nothing for us to delete on the server side.
Your rights (GDPR / CCPA)
Because we don't hold personal data on our servers, the standard rights — access, deletion, portability, objection — apply to data already in your control (your browser's localStorage). For requests about Cloudflare edge logs or AdSense data, contact those providers directly via the links above.
Changes
If we make material changes to this policy, the "Last updated" date at the top of this page will change. Continued use of the site after the date constitutes acceptance of the new terms.
Contact
Questions or requests: hello@calcwize.app.