Could be better
I first tried this app about a year ago, and mentioned to the developer then about a couple of suggestions but still these minor niggles are present: During post-introduction review when typing the meaning of a word in English, the precise spelling is required e.g. 一言, if you type anything but “single word” (like ‘one word’, or ‘few words’, which are correct) it’s wrong. I question the need for this quiz, when Japanese is the main memorisation requirement and multi choice English is already there. The vibration during kana entry is incredibly distracting and annoying. Those 2 things should be a setting to disable. I also found settings area froze for me on occasions. Also during new word introduction, it should be possible to see the first card again, but it’s not possible unless you move to the next card and then back again. I feel this could be a great app, and would like to use it, but currently feels a bit rough and not a smooth experience for the intermediate or advanced student, so I’ll pass for now at least until the above is fixed.