Privacy Policy
Last updated: January 2025
The Short Version
We don't collect personal information. We don't require accounts. We don't sell data. Your calculator inputs stay in your browser and aren't sent to our servers.
What We Collect
Calculator Data
All calculations happen in your browser. The numbers you enter into our calculators are not sent to our servers and are not stored anywhere except temporarily in your browser's memory while you use the tool.
Analytics
We may use privacy-focused analytics to understand which calculators are most useful and how people find our site. This data is aggregated and anonymous — we can see that "100 people used the tire calculator today" but not who those people are or what numbers they entered.
Local Storage
We use your browser's local storage to remember your theme preference (light/dark mode). This data never leaves your device.
What We Don't Collect
- Personal information (name, email, address)
- Your calculator inputs or results
- Location data beyond country-level analytics
- Cookies for tracking or advertising
Third-Party Services
We use the following third-party services:
- Vercel — Hosts our website. Their privacy policy applies to server logs.
- Google Fonts — Provides our fonts. Google's privacy policy applies.
We do not use advertising networks, social media trackers, or marketing tools.
Contact
Questions about this policy? Email us at reach@carmath.fyi.