I wrote about WaniKani a few days ago but neglected to get into detail. Instead, I spent most of that post going on about my failed attempts at learning Japanese. There’s still actually a lot of fail going on since I’m focusing on vocabulary and kanji only and not grammar. Having noted this, I’m not going to get all that far in terms of comprehending actual sentences. 😛 Still, it’s a start and I already know more kanji and kanji compounds than I ever did.
As for what WaniKani is, here’s an explanation of the site: http://www.tofugu.com/2012/04/26/wanikani-sneak-peak/ While this was written over a year ago and the site has gone through some cosmetic changes and tweaks, the fundamental teaching method and mechanics still remain the same.