Another feature I miss is a button to discard a card. E.g. when I study country flags and see a flag I remember perfectly and have always knew - I want to click once and never see it again in the repeat series.
Also, it would be nice if I could choose the correct answer (e.g. a county name for a flag) by clicking it among a set of options instead of typing it in manually all the time.
You can discard a card during initial learning and also during review. This will however remove it so it won't ever come around for review. Not sure if that's what you want? I don't currently support "claim known" during learning, though implementing it would probably be pretty easy.
I don't currently have an option for multiple choice learning. That's something I might do in the far future.
Recognising the correct option from multiple choices is recognition, not recall. Recall is significantly harder and leads to more and better retention st the cost of greater frustration.
Perhaps, yet having to type it every time (I ALWAYS know the correct spelling, for my whole life I have been wondering how do people actually manage to misspell English words, even though English is not my first language ans I have actually had to study it from scratch at the school) is extremely annoying and discouraging, kicking me out of the flow state quickly. I just wonder how much less efficient recognition is compared to recall.
Also, it would be nice if I could choose the correct answer (e.g. a county name for a flag) by clicking it among a set of options instead of typing it in manually all the time.