Show HN: I built an eBook reader that helps you remember what you read

Hey guys, I'm a CS student who loves reading technical books and papers but I realized I was reading really passively. I'd fly through dense material, feel like I understood it, and forget it all within a few pages.

I finished OSTEP less than a week ago and already struggle to recall how locks are implemented. That's why I built Readspace to stop passively reading and finally make the knowledge stick.

It’s an ebook reader with built-in active recall that prompts me every couple pages to explain what I just read. I can respond using the Feynman technique or engage in Socratic-style questioning, and the AI grades my answer and helps you refine it step by step. I wanted an SRS system that actually felt good to use—so I built one directly into the reading flow. The flashcards are AI-generated from what I find important, and they’re scheduled using FSRS.

Readspace has honestly made my reading 10x more meaningful. I’ve stopped cramming for classes because I finally have a systematic setup to learn efficiently.

Would love some feedback or advice—this is the first serious project I’ve shipped!