Privacy

HuanLog Math Tools is designed to need as little of your data as possible:

• No accounts. There is nothing to sign up for and no login anywhere on the site.
• No data collection. Everything you type into a calculator is processed by JavaScript running in your own browser. Nothing is uploaded, stored on a server, or shared with third parties.
• Local preferences only. Your dark/light theme choice is saved in your browser's local storage on your device. It never leaves your device.
• Advertising (future). This site may display ads via Google AdSense in the future. Google may use cookies to serve personalized ads; you can opt out via Google's ad settings. This page will be updated before any ad script goes live.

Questions about privacy: use any contact method listed on the about page.