I like the app and use it often because its a simple and efficient quiz to work on memorization. However, i would really appreciate an update with options to control list of words due to study : either a leitner system, or simply something like "count as known after 5 correct answers". I use the app about every 2 days, and all the counters a reseted, then i learn all the time the same words and dont feel to progress. Except that its a nice app, fast and good in complementarity of a big kanji learning & dictionnary app