Privacy Policy

What we store

FourCalculator does not require an account and does not collect or transmit any personal data to our servers. The only data saved is stored locally in your browser's localStorage, and never leaves your device:

• Your light/dark theme preference
• Which calculators you've enabled or hidden
• A short list of your recently used calculators (for the "Recent" shortcuts on the homepage)

You can clear this data at any time by clearing your browser's site data for fourcalculator.com.

What we don't do

We don't use cookies for tracking, we don't run analytics or advertising scripts, we don't create accounts, and we don't send the numbers you type into any calculator anywhere — all calculations run entirely in your browser.

Hosting & infrastructure

This site is a static, statically-rendered application. Our hosting provider may log standard, anonymized server access data (such as IP address and request time) for security and reliability purposes, as is standard for any web host.

Changes to this policy

If our data practices change, we'll update this page and revise the "last updated" date above.

Contact

Questions about this policy? Reach out via our Support Center.