We only collect minimum personal data that is required to run this website.
If you make a payment and therefore generate a Calculator account we will store your email address to be used for logging in and to identify your account. PayPal handles your payment information.
We also collect anonymous statistics to monitor site performance and security.
This site uses a session cookie to allow you to login. We also use Google Analytics to track website traffic anonymously, which requires another cookie. Google Analytics does not identify individual users nor collect your IP address.