Their Japanese is incredibly odd and wrong.
I have just downloaded this app. My target language is English and native in Japanese. They will give you a test to know your language level but the Japanese sentences was too out off and had difficulty reading because of how terrible it was. I am somewhere about B2, and I wanted to try the “Learn new item” to learn and it is the phrase “No credit cards?” “クレジットカードは使えませんか?” This is rather a beginner phrase in my opinion. Additionally, the app is complicated. I have been playing with it for about 10 mins but I don’t know what to do with the “Learn new items” thing as I have no idea what to tap or do after listening to the audio of “No credit cards?”. I see a bar on top of the screen shows “0/25” which I am guessing it will show the number of the new items I learn, “listening only”, Japanese translation “クレジットカードは使えませんか?“ and just below that, there’s the original phrase in English “No credit cards?”, a heart (add to favourite list), add to list, copy button, a press start button which only plays the audio. So I am basically stuck with the very first phrase and I can’t seem to go through another words and phrases since I don’t know what to do now, I am keep listening to the same audio over and over again now. Also I wonder how they can tell your level of your target language… a bit questionable in my opinion.