Take a dated reference copy with you

1. Open Offline while connected. Select Prepare offline app and wait for confirmation.
2. Find a help entry or exact factory-product source review, choose it and select Save reference offline.
3. Open the saved copy and inspect its review and download dates. Reopen this page without a connection before depending on it away from service.

What is saved

You choose up to 20 public reference copies, totaling at most 1 MB. The offline app itself uses a separate browser cache. This release saves no private journal notes, photographs, account responses or authentication tokens. It does not download the complete catalog automatically.

Dates and source limits

A downloaded copy is a snapshot. Its source may change after review or download. Follow the original publisher's link when connected; an old copy is not a fresh source check. The source-review collection describes what a manufacturer published and does not claim independent physical measurement.

Browser support and storage

Offline reopening is verified in Chromium. Safari and other WebKit browsers have a connected-page fallback; offline installation is unavailable in this release. Browser storage may be cleared or evicted, and private browsing may not retain it. Check that the page and chosen copy actually reopen without a connection.

Remove downloads

Use Remove this device copy or Clear public reference downloads in Offline. To remove the offline app cache as well, clear this site's storage in your browser. Removing these copies does not remove any online account records.

Reference Help (online) · Privacy (online) · Contact (online)

Willis Innovations LLC · Guide reviewed September 14, 2026.