Privacy
Your numbers stay in your browser.
The current companion tools do not require an account and do not send calculator or worksheet entries to a server.
Local storage
Some tools use your browser's local storage so your entries remain available on the same browser and device. Clearing browser data removes those saved entries. Download and print controls operate only when you choose them.
External and affiliate links
Links to Amazon and other external resources are governed by those sites' privacy practices. Amazon affiliate links include a referral identifier so qualifying activity can be attributed after you follow the link. This site does not control what those services collect after you leave the companion library.
No sensitive information
Do not enter passwords, Social Security numbers, payment-card details, customer medical information, or other regulated or highly sensitive data into these planning forms.