I rated this app 3 1/2 years ago, when I first started studying Japanese. Im 4 years in now and have never used another app. This is the only one you need, and now it is free.
In my 4 years of study, Ive made over 400 lists. Ive loaded the program down with so many long and meticulous notes, that a normal app probably wouldnt even be able to start. But this is no normal app. This is a piece of ingenuity. I dont know how the programmers did it, but they made the sturdiest app Ive ever used. Sure it crashes sometimes, but never has data been lost, and with an easy backup system that sends the data right to my inbox, I can rest assured my 400 lists and endless notes are not going anywhere soon. I trust this app with my life, because my life is Japanese study.
Best app ever.
Lucky Vita about Japanese, v3.4