For the amount of money paid, I am not happy with the results. There is no audio, not even for the kana to get you started on pronunciation. There are only two words given for the examples, despite that there may well be 10 different readings, meaning if you wish to memorise the other possible readings you do not even have a word to associate them with, making it very hard (and moreover, pointless) to learn the readings with no examples. These two things are very important so to have them missing on a device that can easily handle such features is a let down.
From my short time using the app, just browsing the kana, I also noticed the example for ち was おちゃ -- which is quite odd since really, it is not pronounced ち in that word. That there is also a listing for ちゃ shows that this should not have been an example for ち and leaves me wondering how many other mistakes there are in this app.
From browsing through the level 4 kanji I am just so disappointed. Since there are only two examples for each kanji, you would think the developers would make the most of the examples. However, frequently the two examples are taken from the same reading; such as 日 having both of its examples as days of the week. The app also seems to really like showing readings that are irregular in its examples, so for 父 -- where it says its readings are フ and ちち -- its example words happen to be おじさん and おとうさん. Wow. How helpful. This happens A LOT. Or, I will see a kanji that under readings will list multiple examples for only reading, making me interested in what those examples mean... but no such luck, they never tell you those words in the examples. Take 外 ... it shows me the reading/words はず.す and はず.れる as two out of its seven readings, so I get interested in why they not only show はず twice, but what those words mean... its example words, however, are いがい and こうがい -- yet another example of only using one of the six different readings this kanji is presented with.
I believe it also has a glitch -- I constantly see the cursor flashing in the text box for some unknown reason, even though I have not clicked the text box. It is extremely distracting and annoying to need to tap to get rid of all the time.
I would not have spent my money on this had I been able to preview how it works I wouldve invested my money in something else, possibly more expensive, but a higher quality learning tool. There just has to be something better on the app store for kanji than this.