Katamarrant

Katamarrant is a focused, offline-first study companion for the 40 Gokyo no Waza, the classical curriculum of judo throws taught in dojos worldwide. Whether you are preparing for a grading, refreshing your memory, or just curious about the names behind the techniques, Katamarrant turns review into a quick daily habit.

KEY FEATURES

• Image-first quizzes: see the technique, identify it from three romaji choices. The reveal panel shows the romaji name, the kanji, and the literal French translation side by side.
• Spaced repetition: techniques you miss surface more often, fresh ones rotate in, and a built-in cooldown stops the same throw from repeating back-to-back.
• Rapid-fire mode: 10-question bursts for warm-ups before practice or quick travel review.
• Browse mode: flip through the full Gokyo, grouped by Kyo (1st through 5th), with kanji and translations always visible.
• Customizable scheduling: daily, twice-daily, smart "if you haven't reached your goal yet", or every-N-minutes with quiet hours.
• Local notifications gently remind you to practice on your own schedule. No push server, no tracking.
• Bilingual interface: full English and French, with auto-detection on first launch.
• Optional cross-device sync: sign in with a magic link by email (no password) to keep your stats consistent across phones, tablets, and desktop.

PRIVACY-FIRST BY DESIGN

Katamarrant works fully offline. Your quiz history stays on your device by default. There are no ads, no analytics, no third-party trackers, no advertising IDs. The optional sync feature, when enabled, only sends your email and your quiz statistics to our server over HTTPS, nothing else.

OPEN SOURCE

The whole app is open source under a permissive license. Read the code, file an issue, or contribute on GitHub: github.com/Leicas/KataMarrant

WHO IT IS FOR

• Judoka of any rank preparing for a grading or refreshing terminology.
• Coaches drilling vocabulary with students.
• Anyone curious about the structure of the Gokyo no Waza and the Japanese names of these techniques.

NOT AFFILIATED

Katamarrant is an independent learning tool. It is not affiliated with the Kodokan, the International Judo Federation, or any national judo federation.