So, I started the trial and I liked this app, but as I progressed through the program I found I needed to go back to previous lessons a lot, which isn’t very easy to do without interrupting and having to restart your current lesson. That made review pretty difficult. I also was dismayed at how quickly my “fluency” rating was increasing despite the fact I continuously needed to review old material. I finally felt I wasn’t really learning much. Plus, you aren’t really taught the written languages. The hiragana and katakana seem to be included incidentally, and kanji get thrown in randomly without explanation.
I hate to say this, but at least for me I found better resources Learn Japanese!!, Learn Japanese!-Kanji and Learn Japanese!!! seem to really be in tune with modern learning techniques, force you to review items you make mistakes on more often, and uses SRS review methods. You don’t need to know what SRS means, but it’s damned clever and really reinforces what you have learned.
Also, Anki is great for memorizing the Japanese alphabets, it’s REALLY important to learn those first if you are even a little bit serious about learning Japanese. I think this app could really improve itself if it took a few pages from these other programs. If they did that, and I had a chance to review the program again, I would like the chance to delete this review and give them the stars I wanted to when I first downloaded the program.