I know this is a pretty fringe use case so I won’t be all that bummed if there’s no satisfactory solution but I received a boox palma e-reader as a gift and since it is an ereader that runs android os and I’ve set it up to be my little japanese learning station.
I’ve of course installed bunpro on it but since it’s a black and white e-ink display the only feedback I’m getting for whether an answer is right or not is whether the right most button at the bottoms says alts (when i get it right) and answer (when I get it wrong) after I submit my answer.
The best solution I’ve found is to set the audio to auto play since it only auto plays when I get the answer right but I’m not always in a place where I can play the sentence audio. I was hoping there’s some sort of setting I’m missing that would give me that feedback in a way that wasn’t dependent on color. maybe with 
symbols, an animation, some sort of ding, or even just the text correct/incorrect above the sentence. If not that’s fine, I know it’s a super niche problem.
I’ll try getting some pictures later
next to the correct answer : (
