Yet another Japanese learning app[0], but something that is very useful to me, so I hope it will be useful for others as well. I struggle to deal with comprehensible input that interests me at this time. The best way to immerse yourself is with content that interests you but sometimes that content is a bit advanced. I'm building this to bridge the gap, you can upload or select content that interests you (or we can recommend you content that would be comprehensible input), and we'll generate short stories, set in the universe of the content you want to learn that will introduce new words you need to understand the original content every week. The words and sentences of these stories will then be reviewed using spaced repetition (using the Ebisu SRS algo as underlying model with some modifications).
[0] https://katarineko.com/