Interesting stuff, HW. As far as I can see you have to download an app for Crossword Genius, though the results of previous clue queries are searchable on the net. I'll gladly concede I was wrong about the use of AI in the case of Crossword Genius - not surprising since I know next to nothing about how AI works. For example, I don't understand how computer software could have "seen" a clue in any given paper.
Danword may well operate on the same basis, but its owners are much less transparent about how it works and there's no attempt to parse or explain clues. I conclude that Crossword Genius is an interesting technological development, even if I have no interest in using it, but I can't help feeling that there is something a bit shady about Danword, however it works.