Apps I built for my own problems

Study app · JLPT N5 → N3

Road to N3

A JLPT study site that tells you why you got it wrong, not just that you did.

The JLPT has beaten me twice, and a score never told me why. So I built the thing I wanted: every wrong answer is tagged with the trap it set, and the app tracks which traps keep catching me.

• Why I miss

  Every wrong option is tagged with its trap (vowel length, look-alike kanji, particle role) and has its own note on why it's wrong in that sentence. Fast-and-wrong means a wrong belief; slow-and-right means recall is still fragile.

• Real test format

  Kanji, vocabulary, grammar, sentence order, reading and listening, with the English translation after every answer (whole passages and listening scripts too), plus timed mock exams scored on the 180-point scale with the real pass line.

• 304 grammar points

  Minna no Nihongo I and II in lesson order plus 122 N3 points by theme, each with its own questions.

• Every kanji, every word

  All 650 N5–N3 kanji and every word on the JLPT lists have questions. The 122 look-alikes sit in 47 groups (休 体 本 木, 間 聞 問 開 閉), so they fight it out side by side.

• Journey and Pass readiness

  Each level is a row of steps, mastered at 80%, with a countdown to the next JLPT; Scores predicts your result out of 180 and says whether you're on track to pass. Progress syncs across devices with no account, because nobody needs another password.

• Noisy listening

  Recorded voices, with optional exam-room, café or street noise underneath, because the real listening room is never silent.

• Claude coach

  Optional: bring your own Claude API key and it explains the pattern behind your real mistakes. The key never leaves your browser.