Try it
Every tool, on one real page — no account, no Box folder. What you choose stays in this browser only.
Demo. Ada Lovelace to Charles Babbage, Ockham, Monday 10 July 1843, first page (British Library, Add MS 37192, f. 362; public domain; image as reproduced in Stephen Wolfram's 2015 blog post). The three readings are made up to show how disagreements look: they are not a checked transcription.
Every image is checked by eye, right way up, and signed off. Click a card's buttons to mark it; the real sheet works the same way for thousands of images.
Every reader's text side by side, with your rulings. In a real project each reader is a person or an AI system, each in its own file.
Every choice is kept with its time. Copy all pastes into Excel; Download gives a CSV.