Privacy Policy
Last Updated: December 2025
I built this site with a "privacy-first" mindset. Here's exactly what I collect and why.
The Short Version
- ✓Your calculations stay on your device. I don't store your numbers.
- ✓No account required. No email, no password, no tracking.
- ✓Basic analytics only. I see which pages are popular, but not what you calculate.
- ✓Ads help keep it free. Third-party ad networks may use cookies.
What I Collect
1. Calculator Inputs (Stored Locally)
When you use a calculator, all your numbers stay in your browser. They never hit my server. If you close the tab, they're gone. I literally cannot see what you're calculating.
2. Basic Web Logs
Like every website, I collect standard server logs: your IP address, browser type, which pages you visit, and when. This helps me fix bugs and see which calculators are most popular.
3. Cookies
I use cookies for basic site functionality. Third-party ad networks (like Google AdSense) also use cookies to show you relevant ads. You can disable cookies in your browser, but some features might not work.
What I Don't Collect
- ✗Your name, email, or phone number (unless you email me)
- ✗Your financial data, health data, or any calculator inputs
- ✗Your location (beyond what your IP address reveals)
- ✗Anything from kids under 13
Third-Party Advertising
I use third-party advertising companies to serve ads. These companies may use information about your visits to this and other websites to provide ads about goods and services that might interest you.
Data Security
I use industry-standard security measures to protect your data. But let's be real: no website is 100% secure. Since I don't store your sensitive data in the first place, there's not much to steal.
Changes to This Policy
I might update this policy occasionally. If I make major changes, I'll update the "Last Updated" date at the top. Check back periodically if you're curious.
Questions?
If you have questions about this privacy policy, email me at [email protected].