Hiragana Katakana Quiz

Please fix the following two signs in hiragana and katakana. ぢ should be translated as "ji" not zi じ should also be "ji" not zi Same for Katakana. I enjoy the simplicity of the app as it simply does what it needs to do. Provide a quick quiz for either or both alphabets. But the error is a mistake that causes confusion, especially for beginners.

nice layout, but no ability to choose what you want to learn. Option for test 10 and test all, but the chosen randomly so there's no pattern to assist with memorization.

Very good app, does what it says in the box, no annoying ads every 5 seconds. What would take it to the ultimate level would be the ability to customize quizes.