Its really easy to used basically its a multiple choices exercise, you can improve in a really faster than using just books.
Just there is no sound for how to pronounce (it for the price and huge around of word that understandable, so I leave 5 stars), but the is the kanji and kana writing which is great.
I really improved my skill so thanks.
And thanks your make two versions (iPad and iPhone), hope youll do it on the japanese 2000 app which is great too.
Miscipsa about JLPT Study, 1-5 Level Kanji and Vocabulary Japanese Language Proficiency, v2.5.3