1. The short version
- The numbers you enter into any calculator stay in your browser. They are never sent to us or to any third party.
- We store a small number of preferences (theme, language, currency, cookie choice) locally on your device.
- Advertising scripts load only after you press Accept.
- We do not sell personal data.
2. Cookies and local storage
CalcHub uses localStorage — not tracking cookies — for functionality:
calc.theme— light or dark theme.calc.lang— your interface language.calc.currency— your selected currency symbol.calc.consent.v1— your advertising consent choice and its date.
These keys contain no personal data and can be cleared at any time through your browser settings. Removing them simply resets your preferences.
3. Advertising
We use Google AdSense to display advertising that keeps these tools free. Google and its partners may use cookies to serve ads based on your previous visits to this or other websites.
- Advertising scripts are not requested until you explicitly consent.
- Consent choices last 180 days; after that we ask again.
- Declining does not reduce any functionality — every calculator keeps working.
- You can review or change your choice any time using the cookie settings link.
For information about how Google uses data on partner sites, see Google's partner sites policy. You can also opt out of personalised advertising in Google Ad Settings.
4. Analytics
CalcHub does not run a third-party analytics tracker by default. If a privacy-friendly, cookie-free page counter is enabled in the future, it will collect aggregated page views only — no identifiers, no cross-site tracking.
5. Service worker and offline storage
The site registers a service worker so pages load instantly and work offline. It caches page files only. It never caches your input values.
6. Third-party links
We link to our sibling tools (land, QR, PDF and image utilities) and to our parent website, tmsofts.in. Those sites have their own privacy policies.
7. Children
CalcHub is a general-audience planning tool and is not directed at children under 13.
8. Your rights
Because we do not collect personal data on a server, there is nothing for us to export or delete on your behalf. You retain full control of anything stored on your own device. For questions about advertising data, use the Google links above.
9. Contact
Questions about this policy? Reach us at the details on the contact page.