Privacy
This site collects almost nothing. There are no accounts, no comment forms, no stored queries and no analytics beyond a site statistics counter.
What is collected
The statistics counter records page views and approximate referral information in aggregate. It does not build personal profiles and the notebook does not attempt to identify readers.
The calculator tool runs its arithmetic locally in the browser. Inputs are not stored, transmitted or logged.
What is not collected
No contact information, no payment information of any kind and no behavioural advertising profiles. The labelled advertising units are served by the site's own script and link to an external index; the site sets no advertising cookies of its own.
Contact and changes
Corrections can be proposed through the About page's editorial policy. Changes to this policy are dated and the previous version remains visible.