Hi Gordon,
That's really useful to me too. And so nice of you to give a technical solution that you don't agree with pedagogically.
I think it depends on the kind of students you're working with. I've been lucky enough to mainly work with adults who actually want to learn English - not just get a good score - so it doesn't seem right to penalise them if it's a learning exercise and not a test. Maybe they just don't know the word or maybe they do but need the first letter to find it - I know I sometimes do.
I assume it'll work for the other apps and not just JCross?
Cheers,
Glenys