I'd like to suggest a built-in voice recorder for both the web version and IOS app.
The purpose would be to conveniently be able to read out the prompts and record one's voice, and compare that to the audio files that are already on Skritter.
I have a voice recorder and can use that, but it would be much more convenient to be able to just press a button to record/listen, and then move on and not have to rewind the recordings like with most voice recorders.
Chinesepod has recently added this to their IOS app and I think it's a great addition and I find myself recording my voice much more than I used to