Are you intend to study Japanese language in the next and you want to have a powerful application to help you. this app Japanese In Use is one of app like that, it'd been made following the "minna no nihongo" books content.
With Japanese In Use you can:
+ easy to trace vocabulary for each lessons
+ easy to learn all the grammar.
+ listening to have exactly pronunciation for all the lessons.
+ you can see many basic communicate examples.
+ share you experience with your friend via FB with just some clicked
With all 50 lessons(vocabulary, grammar, audio, kanji, sample in common use), you will have strong enough to friendly with Japanese
Thank you, hope you will like the app