KataPrep: Six Sigma Exam Prep

KataPrep is exam prep for the Lean Six Sigma Green Belt — built the way of the floor: you learn by doing, not by watching.

Most prep drowns you in slides. KataPrep hands you the tools and puts you to work. A guided path of stations walks you through the whole body of knowledge — Lean Foundations, then Define, Measure, Analyze, Improve, and Control — one focused ten-minute session at a time. Master Daru, your companion, keeps you honest and moving.

WHAT YOU GET
- A path, not a pile. Stations unlock in order across all five DMAIC phases plus Lean Foundations, so you always know the next right thing to study.
- Kata Trials. Apply what you've learned to realistic defects and scenarios — the way the exam actually tests you.
- An honest readiness score. It never flatters you: the "book the exam" gate opens only at 85% overall with every phase past 75%.
- Spaced review that fights forgetting. Cleared stations fade over time and return to your queue right when you're about to forget them. Repair them, and they stick.
- Ten minutes a day. One gentle daily nudge, a streak to keep, and rest tokens that cover the day life gets in the way.

FREE TO START. ONE PRICE, EVER.
Begin the Yellow Belt path free — the fundamentals, end to end. Unlock the full Green Belt path once, with a single in-app purchase. No subscription. No renewals. No ads.

PRIVATE BY DESIGN
Start anonymous — no email, no sign-up wall. Your progress lives on your device and syncs across your own devices only if you choose to link an Apple or Google account. Your study data is stored in the EU. We sell the unlock, not your data — no ads, no trackers, no resale. Export or delete everything yourself, any time, from Settings.

WHO IT'S FOR
Working professionals, students, and anyone preparing for a Lean Six Sigma Green Belt certification who wants to actually retain the material — not just cram it.

KataPrep is an independent study aid. It is not affiliated with, endorsed by, or sponsored by ASQ, IASSC, or any certification body.

The floor is ready. Begin when you are.