Works, but crashes

This app helped me over the hurdle of learning the 46 basic hiragana characters, so on that basis I highly recommend it.
However, it crashes in the quiz function after a few quizzes—both on my iPhone and iPad. Sometimes the characters are missing, sometimes one or two of the answer options are missing, sometimes it just quits.
But dont let that stop you from learning!

stevanabB about Dr. Moku's Hiragana Mnemonics