This app is one of the best tools for learning Japanese as a beginner. Great examples, useful vocabulary, real voice-recorded audio, and reliable grammer. I think it's better than a lot of textooks you could buy. It is worth the money.
The first Human Japanese app does not contain kanji, but as a beginner it might be okay to wait and understand the basics first. The second app in this course, Human Japanese Intermediate, introduces kanji.
Overall, this is a 5/5 star reccomendation if you are self-studying Japanese or are looking for supplementary materials.