N1 Grammar app for iPhone and iPad

[N1 Grammar] is an application help you study N1 Grammar of Japanese.
This application includes main functions below.

1. It has all 99 N1 Grammar patterns.
2. There are a lot of example sentences in one grammar pattern.
3. You can order list of grammars by number or Japanese Hiragana letters.
4. It saves history of grammars pattern that you have studied.
5. You can save favourite grammars into favourite box. So you can review these grammars late easily.
6. You can find grammar that includes any word you want.
7. You can share what grammars you are studying with friend though Facebook or Twitter.
8. You can change the display font size.
9. It supports three languages: Japanese, English and Vietnamese.