Privacy policy
Last updated: September 18, 2026
We process account and saved-scenario data when those features are used, as well as limited website-usage data for analytics and service improvement.
Data we use
When you sign in through Supabase, your email address is processed. Saved scenarios contain a title, calculation type, and parameters entered by the user.
Why we use it
The data is used for account access, scenario synchronisation, restoring saved calculations, and service security.
Storage and access
Account and scenario data is stored in Supabase. Row Level Security limits access so users can read and modify only their own scenarios.
Local settings
Language and theme preferences may be stored in the browser's local storage and remain on the user's device.
Website analytics
The site uses Google Analytics to understand traffic and how users interact with the service. Google Analytics may process page views, interaction events, browser and device information, approximate geographic data and online identifiers, and may use cookies or similar technologies. This data is processed by Google under its own privacy policy and is used by us for statistics and to improve the site.
Deleting data
Users can delete individual scenarios in their account. To request deletion of an account and related data, contact the developer at the address below.
Financial information
The calculator does not request payment-card details or passwords for banks, brokers, or cryptocurrency wallets.
Voluntary support
PayPal payments are processed by PayPal, and the site does not receive card details. Cryptocurrency transfers are sent directly to public addresses, so their amounts and transaction history may be visible on the relevant blockchain.