kotokeep remembers the words you stop for

Field notes

kotokeep uses screen-pixel reading rather than ordinary copy-and-paste, allowing the page to target scanned PDFs, remote desktops, virtual machines, games, and videos. Looked-up terms are grouped into 60-word decks, with review timing influenced by how often a word has caused trouble. The page lists 23 languages and says eight include bundled dictionaries that work offline; sentence translation still requires an internet connection.