It’s called Wanikani Heatmap and it’s a script found here:
I use it too.
I’m going to level up in 30 mins. It will be my fastest level since level 2.
Did not expect to level up in this timely manner since school is out.
However I am already behind in vocabulary (45 lessons currently waiting and I already did 15 or so today) So that will only get more once I guru the final 2 kanji.
I hope to tackle another set at 6pm tonight, once the initial new reviews have moved up.
And then the final bit tomorrow morning when the little one is off to school again. Which means I can also start the radicals tomorrow. And maybe a few kanji, depending on how I feel.