The original WaniKani is not anymore maintained, but the code was recently open-sourced so additions are possible. I have taken the freedom to play around with it a little. If you want to check it out see this post here: [STATS] Statistics site - #1560 by LeonKat
So if there is anything missing and you want it added I can try it as soon as I have time. As I am no Kanji Master yet 
help with what is missing + JLPT / Joyo Level would be appreciated!