Last updated: May 2026
calculate.coffee is a client-side web application with no backend server. This page explains how your data is handled.
Data Collection
calculate.coffee does not collect or transmit any personal data to external servers. All brew log data you create is stored locally on your device using IndexedDB (idb-keyval) and never leaves your browser.
Analytics
This website uses Google Analytics (GA4) to understand anonymous usage patterns, such as which brewing methods are most popular. No personally identifiable information is collected through analytics.
Advertising
This website uses Google AdSense to display advertisements. Google AdSense may use cookies and similar technologies to serve personalised ads based on your interests. You can review Google's privacy policy at policies.google.com/privacy.
Affiliate Links
Some equipment links on this site are Amazon Associates affiliate links. As an Amazon Associate, calculate.coffee earns from qualifying purchases. This means we may earn a small commission at no extra cost to you when you purchase through these links. Affiliate links are clearly marked and we only recommend products relevant to specialty coffee brewing.
Cookies
Cookies are used by Google Analytics and Google AdSense only. No additional first-party cookies are set by this application.
Local Storage
Your brew logs and app preferences are stored in your browser's local storage and IndexedDB. This data never leaves your device. You can clear it at any time through your browser settings.
Contact
For questions about this privacy policy, contact:
[email protected]