You will need to install a user script manager extension to install this script.
Reorders wanikani reviews by level, so that apprentice items show up first, and so on. Good to have if you have lots of reviews and don't want to do them all today. Based on Wanikani Review Order by AlucarDeck, based on the code from wanikani user Pyxzure.
Single mode asks you one item at a time, and Bulk Mode works as wanikani normally does, but ordered by SRS level.