I stumbled upon WaniKani when searching for Android apps related to learning Japanese. I found it on one of the most recent blog posts about that topic on GaijinPot. After I downloaded the unofficial WaniKani for Android app I was at first weirded out by having to enter an API key, so I decided only days later to actually visit the website, sign up and use the app. Some time later I checked out the website in depth and got hooked, the community having no small part in that 
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