About

nerdreps is a language learning app built around a simple trade: study vocabulary, and it pays you in stories you can actually read.

At its core it is a spaced-repetition system covering the first 1,000 Japanese words by frequency, scheduled with FSRS-6 so every review lands right before you would forget. On top of that sits the Stories tab: 37 short stories whose vocabulary is mapped word-for-word to the deck. A story unlocks when your real review history shows you know at least 95% of its words, never more than one unknown word per sentence, so reading previews what study is about to teach and study pays off what reading made you curious about.

A few things worth knowing:

• Reviews are typed, not multiple-choice, and every word has a forgetting-curve chart if you like your metrics nerdy.
• Every story sentence is narrated, with read-along highlighting, adjustable speed, and toggleable furigana.
• It is local-first: no signup to start, progress lives in your browser, works offline as a PWA, and syncs if you make an account.
• The free tier (three levels and six stories) is free forever. One paid upgrade unlocks every level and every future Japanese content update.

For the story behind it, read Hello, World! (why it exists) and the launch post (how the reading mechanic works).

Built by Sprocket. Feedback, bug reports, and strong opinions are all welcome: [email protected].