Your Privacy Matters
We believe privacy is a fundamental right. Here's exactly how we protect yours.
Last Updated: December 9, 2024
Privacy at a Glance
No Data Collection
All calculations happen locally in your browser. We never see your inputs or results.
No Personal Tracking
We don't use cookies to track you across the web or build profiles about you.
No Data Selling
We will never sell, rent, or share your personal information with third parties.
100% Transparent
This policy is written in plain language. No legal jargon hiding unfair practices.
What We Collect
Spoiler: Almost nothing
Calculator Inputs
All your calculator inputs (numbers, dates, values) are processed entirely in your browser. This data never leaves your device and is not stored anywhere—not even temporarily on our servers.
Anonymous Analytics
We use privacy-respecting analytics to understand which calculators are popular and how to improve our service. This data is aggregated and anonymous—we cannot identify individual users.
Contact Information
If you choose to contact us via email, we'll have your email address and any information you voluntarily provide. We only use this to respond to your inquiry.
What We Don't Do
Our privacy promises
- Create user accounts or require registration
- Store your calculation inputs or results
- Use tracking cookies or fingerprinting
- Share data with advertisers
- Build profiles about you
- Sell or rent your information to anyone
- Send marketing emails unless you request them
Cookies & Local Storage
We use minimal cookies and local storage only to:
Theme Preference
Remember your light/dark mode choice
Language Preference
Remember your preferred language (English/Spanish)
Essential Function
Enable basic website functionality
These cookies are strictly necessary and do not track you. You can clear them anytime through your browser settings.
Third-Party Services
We use a minimal set of third-party services:
Hosting
Our website is hosted on Vercel, which may collect standard server logs (IP addresses, browser type) for security and performance purposes.
Analytics
We use privacy-focused analytics that don't use cookies or collect personal data.
Children's Privacy
Our calculators are designed to be educational and useful for users of all ages. We do not knowingly collect any personal information from children under 13 (or applicable age in your jurisdiction). Since we don't collect personal data from any users, children can safely use our calculators.
Your Rights
Depending on your location, you may have the following rights:
- Access any personal data we have (though we likely have none)
- Request deletion of your data
- Opt-out of analytics
- File a complaint with your local data protection authority
To exercise any of these rights, please contact us at the email below.
Changes to This Policy
We may update this privacy policy from time to time. We will notify you of any significant changes by posting the new policy on this page with an updated revision date. We encourage you to review this policy periodically.
Contact Us
If you have any questions about this Privacy Policy or our privacy practices, please contact us: