AXON vs Katachi

9 quick cognitive games that get genuinely difficult. Chimp Memory — numbers flash on a grid, then hide. Tap them in order. Flash Sequence — watch cells light up, repeat the pattern. Color Match — the word says "red" but it's printed in blue. Don't fall for it. Speed Math — solve equations fast. They get ugly. Pattern Hunter — find what's missing in a sequence. Word Connect — drag through letters to spell real words before time runs out. Operator Chaos — figure out the missing +, -, ×, ÷ to make equations work. Spatial Stack — count cubes in 3D. Some are hidden behind others. Paradox Flow — match cards by suit, color, or value. Rules keep changing. Each game has 5 difficulty tiers. Tier 1 is warm-up. Tier 5 is where most people start making mistakes. There's a daily challenge if you want a reason to come back, and a cognitive profile that tracks how you're doing across memory, speed, logic, and focus over time. No ads. No subscriptions. No accounts. Nothing leaves your phone.

〔What is Katachi?〕 Shapes stream across the screen — circles, triangles, squares, stars — in four directions and five colors. One rule: tap only the ones that match the prompt. Sounds simple. Gets real fast. 〔Four Ways to Play〕 · 10-Question Challenge — Four difficulty levels (Easy to Expert) plus negation prompts ("tap everything except…") keep every session fresh · Daily Challenge — 10 questions shared worldwide each day. Track your streak and share results Wordle-style · Endless Mode — Survive as long as you can. No mercy. · 200 Levels — A long-form progression that grows with you 〔Brain Age〕 Your reaction speed is measured and converted into a brain-response age (15–80). Play daily to push it younger. 〔Built with care〕 · 80 prompt patterns (4 shapes × 5 colors × 4 directions) · Detailed stats with Swift Charts · Dark mode and color-accessibility support · No internet required (except ads) · Zero personal data collected 〔Privacy〕 All gameplay data stays on your device. No account needed. Privacy Policy: https://kazusa703.github.io/privacy.html Terms of Use: https://kazusa703.github.io/terms.html Support: https://kazusa703.github.io/support.html