What stays in the browser
Entered weights, scale tickets, dates, notes, and scenario names are calculated on your device. The Save locally button stores a scenario in this browser’s IndexedDB. There is no automatic server save, synchronization, external OCR, runtime AI service, or analytics.
Closing an unsaved sheet discards it. Saved scenarios persist until you delete them or the browser clears site data. Private browsing and storage restrictions may prevent saving. Export JSON if you want a backup you control.
What the host can see
The browser requests public HTML, JavaScript, fonts, and configuration files. A host may log those requests and ordinary connection metadata such as an IP address. A selected public configuration ID can appear in a calculator link. Your weights and personal scenario fields are never placed in that URL or sent in those requests.
The site does not use third-party fonts or tracking scripts. Clicking an original manufacturer source opens that publisher’s service under its own privacy practices.
Delete or export
Open the Results step to delete one saved scenario or all saved scenarios. JSON and CSV downloads are generated in memory. Printing uses your browser’s print dialog, including its PDF option. Files that you download or print are controlled by you and are not removed by deleting the browser’s saved scenarios.