I haven't made any purchases on this yet, but it's important to note that you need familiarity with kana and kanji to begin with. It's not flash cards with English meanings. It tests your knowledge of kanji (Chinese characters) by using kana (Japanese phonetics) to see if you understand how the kanji are used. Like for the number one, it will test you on the different ways to say it for different words. "One" by itself is pronounced "ichi," but "one of something" is the word for "one" plus the phonetic "tsu," making the word "hitotsu." This type of thing you need to already know. But there is a list of the kanji they are testing you on, so you could study them as you go, I suppose. They don't list exactly what they are, but you see the meanings in English, so you should be able to look them up before taking the tests. This type of learning app is an awesome idea! I'm just afraid I don't have enough knowledge of Japanese to get very far. I only know the very basics from studying on my own.