Kata Spinner

Computerist Solutions

About this app

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.

What’s new

0.4.0

• Better on foldables and tablets: content stays a comfortable width on large screens.
• Your place is preserved when folding/unfolding or rotating — open sheets and reveals no longer reset.
• Smoother screen rotation.
• Updated Android components.