Kata Spinner

Kata Spinner is a frictionless daily-practice companion for karateka. Open the app, tap Spin, and get a random kata to train. Mark it done, and see your practice history build up over time. Built for solo training. No accounts, no ads, no tracking, no internet required. — THE CORE LOOP — • Spin → a random kata from your enabled list • Train it • Mark as Done — or Spin Again for another That's it. The whole flow takes seconds. — BUILT FOR REAL TRAINING — • 27 Shotokan katas included, from Taikyoku Shodan through Unsu and Wankan • Names shown in Romaji with Japanese kanji underneath; tap for the English translation • Filter the spin pool by your rank (10th kyu through Shodan+) so the app only picks katas in your current syllabus • Disable any kata you don't yet know — the spinner will skip it • Optional training modes: Normal, Slow, Fast, or Backwards — randomized alongside the kata when you want variety — DAILY PROGRESS, AT A GLANCE — • "X / Y done today" counter on the home screen • Today's practiced katas shown as a quick strip • When you've completed every kata in your pool, a one-tap "Include completed" toggle lets you keep going — the app never locks you out — PRACTICE HISTORY — • Month calendar view shows every day you trained, with the count of katas practiced • Tap any day to expand the list of katas and training modes used that day • Read-only and private — your history lives on your device — OFFLINE-FIRST AND PRIVATE BY DESIGN — • No account required, ever • No network calls, no analytics, no crash reporting cloud • No ads, no in-app purchases • Your practice data stays on your device — WHO IT'S FOR — Karate practitioners — initially Shotokan — who want a low-friction nudge to practice at least one kata a day, and a quiet record of the work they've put in. If you've ever stood in your dojo or living room thinking "which kata today?", this is for you. Spin. Train. Log. Repeat.