Privacy Policy

1. Information we collect

• Calculator inputs — not collected. The dates, times and values you enter into our calculators are processed entirely in your browser. They are not sent to, or stored on, our servers.
• Usage & device data. With your consent, we collect anonymous analytics such as pages viewed, which calculators are used, approximate location (country/region), browser and device type.
• Email address (optional). If you choose to subscribe via a form on the Site, we collect the email address you provide, to send you updates you asked for. You can unsubscribe at any time.

2. Cookies & consent

We use cookies and similar technologies for analytics and, in future, advertising. When you first visit, a consent banner (provided by CookieYes) lets you accept or decline non-essential cookies. Analytics and advertising cookies are not set until you consent, and you can change or withdraw your choice at any time using the cookie settings link in the banner.

3. Analytics

We use Google Analytics 4 (via Google Tag Manager) to understand how the Site is used so we can improve it. Analytics runs only after you grant consent, using Google Consent Mode. Google may process this data as described in the Google Privacy Policy.

4. Advertising

We may display advertising served by third-party vendors, including Google. These vendors may use cookies to serve ads based on your prior visits to this and other websites.

• Google's use of advertising cookies enables it and its partners to serve ads based on your visits to our Site and/or other sites.
• You can opt out of personalized advertising by visiting Google Ads Settings.
• You can opt out of third-party vendor cookies at aboutads.info/choices or youronlinechoices.eu (EU).

5. Third-party services

We rely on the following providers, each with their own privacy practices: Google (Analytics, Tag Manager and advertising), Cloudflare (hosting, security and performance) and CookieYes (consent management).

6. Your rights

Depending on where you live, you may have the right to access, correct, delete or restrict the processing of your personal data, and to withdraw consent at any time (GDPR for the EU/UK; CCPA/CPRA for California). To exercise any of these rights, please reach us via our Contact Us page.

7. Data retention

Anonymous analytics data is retained according to our analytics provider's standard retention periods. Any email address you provide is kept until you unsubscribe or ask us to delete it.

8. Children's privacy

The Site is not directed at children under 13 (or the minimum age in your country), and we do not knowingly collect personal data from them.

9. Changes to this policy

We may update this Privacy Policy from time to time. Material changes will be reflected by the "Last updated" date above. Please review this page periodically.

10. Contact

Questions about this policy or your data? Please visit our Contact Us page.