I am thinking that for each vocabulary/kanji why we don’t have a third card of listening at review setion. In details, after listening a vocabulary/kanji, I need to input the meaning. In this way, I am able to practice reading, listening & speaking.
Presumably because WaniKani wants to do the thing that they are focused on, and just do that thing well. Making a listening practice app would be a whole new project, since it creates all different challenges from a reading app.
You might be interested in the website SuperNative though.