You are Learning Japanese? And want to have a powerful tool to help you. this app Japanese Learning, Common Use is one of the tool like that, itd been made follow the "minna no" books content, kanji flashcard, dictionary(comming soon)...
With Japanese Learning, Common Use you can:
+ easy to learn kanji by level from n5 -> n1
+ easy to trace vocabulary for each lessons
+ easy to learn all the useful grammar.
+ listening to have exactly pronunciation for all the lessons. from that you can easily to communicate with Japanese.
+ you can see many basic communicate examples in the Japanese daily. this is one of steps to make Japanese more friendly with you
With all 50 lessons and kanji from jlpt n5 -> n1, you will have strong enough to friendly with japanese