This app is a light and compact AIUEO flashcards app. On the list table (Ichiranhyo) screen, the table from あ(A) row to ん(N) is displayed. On the flashcards screen, you can switch to the next character with a good tempo each time you tap it. If you push the test button, you can do a quiz-type test in which the AIUEO button is pushed to the right. See the screenshot for more details.