Japanese kanji dictionary + handwriting spaced repetition
kaku.so is two tools in one: a fast Japanese dictionary and a spaced-repetition study system built on top of it. Unlike Anki, nothing to build - see a word, tap once, it's in your reviews. And it trains recall, not recognition. No multiple choice, no tapping the "right" answer - you handwrite each word from memory, stroke by stroke, on a canvas. Reviews hit right before you'd forget. For dedicated learners it's brutal in the best way - it turns you into a kanji terminator.
