Your numbers.
Your business.
The calculations happen in this page, on your device.
Publisher
HandyShelf publishes this website. The calculators are provided for general information, with methods and limitations documented on each tool page.
Calculator inputs
Calculations are in memory unless you explicitly save a record. We do not send inputs, results, diary entries, run records, or names in network requests or page URLs.
A few local preferences
Local storage remembers your theme and, if you choose “Pin calculator”, the names of your saved calculators. You can clear pinned shortcuts from the home page. We set no cookies. If storage is unavailable, calculators still work.
Optional records on this device
Completed runs and your optional first name use IndexedDB. Step totals and food diary days use local storage. These records are scoped to this browser and site address. They do not sync and may be erased by clearing browser data. Export and delete controls are available in each tool. To clear your name, leave the greeting field blank and save.
Loading the website
Your browser requests HTML, styles, scripts, and illustrations from the host. The host may receive IP address, browser details, requested URL, and request time. Local calculations do not hide a website visit.
No analytics or advertising yet
This build has no analytics, advertising scripts, external fonts, or tracking pixels. This policy and security settings must be reviewed before integrations are enabled.
Copies and downloads
Copying uses your clipboard. Printing or downloading creates a copy outside the page. Your device and browser control those copies. Browser extensions are outside our control.
Updated 9 November 2026.