Privacy Policy
Last updated: April 19, 2026
1. Information We Collect
CalcHub collects minimal information necessary to provide our services:
- Usage Data: We collect anonymous analytics data including pages visited, time spent, and features used — to improve our services.
- IP Addresses: We log IP addresses for security purposes and to prevent abuse of our calculation APIs.
- Cookies: We use cookies for user preferences (dark mode, language) and analytics.
We do NOT collect: Calculator input values, personally identifiable calculation data, or require account registration.
2. How We Use Information
- To improve calculator accuracy and website performance
- To analyze usage patterns and add new features
- To display relevant advertising through Google AdSense
- To prevent fraud and abuse
3. Google AdSense & Third-Party Advertising
We use Google AdSense to display advertisements. Google may use cookies to show you relevant ads based on your browsing history. You can opt out at Google's Ad Settings.
4. Google Analytics
We use Google Analytics to understand how visitors use our site. This data is anonymized and aggregated. You can opt out using the Google Analytics Opt-out Browser Add-on.
5. Data Retention
Anonymous analytics data is retained for 26 months. Server logs are retained for 90 days. Cookie preferences are stored locally in your browser.
6. Your Rights (GDPR)
If you are in the EU/EEA, you have rights to: access, rectify, erase, and port your data. Contact us at privacy@calchub.com to exercise these rights.
7. Children's Privacy
CalcHub is not directed to children under 13. We do not knowingly collect personal information from children.
8. Contact Us
For privacy-related questions: Contact Form