I bought both last Saturday. I’m becoming addicted.
Kanken is short for kanji kentei, which is the national kanji exam. There are 10 levels: from 10th to 1st kyu. 10th kyu is the level of an early elementary school student. 1st kyu is about the level of a kanji Ph.D. An educated university graduate should be around 3rd Ku.
The Kanken DS3 game is great for learning kanji and prepping for the kanken. It’s so much better than studying kanji from a textbook. It’s portable & compact. The amount of exercises held on this would amount to a few backpacks of workbooks. It’s fun and doesn’t feel like studying. The game was less than 3,000 yen ($25 US). You can gradually increase your level. The game displays charts that analyze your abilities. There are quick 10 minute mock exams and actual 40 minute simulations.