Synthetic use only: photograph a made-up page. Nothing is uploaded and nothing is stored: the photo lives in this tab's memory until you reload. The page makes no sound. Model files come from this site only.
Tap in the box, then the keyboard's Scan Text button (or long-press → Scan Text) and point the camera at the page. Or open the photo in Photos, select its Live Text, copy, and paste here. Keep one line per line.
From the page's own resource timing (the Tesseract worker's fetches are inside the worker and do not show here; see the spike README for the full check). A red line is a fetch from any other site.