Someone has probably asked this before but would it be possible to add a function so that you didnt have to keep reviewing very basic kanji like 一、日、白、etc. I have a lot of cards in stack 4 that need periodic review and it would be nice to be able to separate out these very easy ones as "permanently learnt". Maybe when you pressed the "Easy" key the cards could be moved to a separate "Easy" pile.

I remember that being a pain as well, but if they're that easy then the reviews should be lightening quick and will quickly get to the point where you don't see them anymore (relatively anyways)

Unless I'm mistaken, stack 4 actually is stacks 4, 5, 6, etc. just being shown as that one set. So the easy cards will get more and more spaced out even though stack 4 would be a 2 month review.

Yes, I too had similar annoyances with the fact I had previous memorized kanji to push through. Now it's not too bad.

Even with every card in the final stack, there are an average of about 9 reviews per day, which isn't a lot, but a bit of a pain to have to deal with all the time. It would be nice to be able to retire cards that you know you're never going to forget and continue to refresh the trickier ones.