Privacy policy

What this page owns

Privacy and data practices for using the site. For educational limits on calculator outputs, see Disclaimers. For site use rules, see Terms of Use. To reach us, see Contact.

Data map

Three buckets. Read these before the detail sections.

Calculators

Free tools are built so the core math runs in your browser. You do not need to register to calculate. If a page offers Share, the snapshot lives in the URL you copy. If a Pro beta page offers save/print, that snapshot is stored in your browser unless you configure an optional sync endpoint yourself.

See About for the public evidence statement on client-side tools.

Cookies and analytics

We may use cookies and analytics (for example Google Analytics) to understand aggregate traffic: pages viewed, rough geography, device class, and performance. Calculator field values are not what those tools are for.

Consent Mode v2: In the EEA, UK, and Switzerland, analytics cookies stay off until you Accept or customize preferences. Outside those regions, analytics may be enabled after a geo check; you can still reject cookies via the banner when it is shown.

Hosting and CDN providers process request logs needed to deliver pages. Third-party sites we link to have their own policies.

Contact email and Pro

If you email cihattoplutas@gmail.com or use a Contact mailto lane, we receive whatever you include (URL, description, your return address). That is voluntary correspondence, not calculator telemetry.

Pro features described on /pro may add optional cloud sync only when you configure it. Until then, treat Pro beta saves as local to your browser.

If a newsletter signup appears on a hub and you submit an email, that address is sent to our newsletter endpoint and, when configured, to the webhook behind it. Hub renewals currently omit signup UI; the endpoint remains for optional use.

Your choices

• Use the cookie banner to accept, reject, or customize analytics where offered.
• Clear site data in your browser to remove local Pro snapshots and URL state.
• Contact us about privacy questions at cihattoplutas@gmail.com or via Contact.
• Depending on where you live, you may have additional rights under laws such as GDPR or CCPA. Tell us your request and jurisdiction so we can respond appropriately. We do not sell personal information.

Changes

We may update this policy when practices or products change. The date at the top of this page is the current version. Material changes will be reflected here; keep using the site only if you accept the current policy.