Thanks for the tip about keyboard shortcuts. But it looks like there are only shortcuts for diatonic intervals. What about when I'm in chromatic scale mode, and I need to differentiate between e.g. major and minor intervals?

I would like to see an option in interval identification where, rather than successive pairs of notes, you're given a continuous stream of single notes, and for every new note you have to identify the interval between it and the previous note. This would be better training for 'intervallic hearing ...