I really appreciate having the app and I only use either iPod or iPad now. (The Professor has just come up and told me "We're working on an iPhone and iPad app", which seems a bit out of date...
There are a lot of noises when it's set with the sound on. There is a sound every time I finish a word, I think. Then every 5 minutes there is an odd Chinese male voice saying something. I didn't notice it at first. It is usually blocked out by the other sounds. I get a visual notice that I've done 5 minutes, but the voice doesn't seem to say that. In fact, at 15 minutes it seemed to say feichang hao, which is odd, because it doesn't know how well I've been remembering things.
Might it be possible to switch this voice off? It's just irritating because it clashes with other sounds. Or could it just say "five" or "ten" or whatever? But I see that in writing anyway.