Updated Aug 11, 2026 · v1.1.0
3 play modes. Chimps average level 9 in Classic — can you beat them?
See the numbers. Remember them. The moment you tap "1", every other number hides. Tap them in order from memory alone. Each success adds another number — until you find your limit. In a famous Kyoto University study, chimpanzees breezed past level 9. Can you beat a chimp in Classic mode? 3 Play Modes • Classic — levels 1-9 are pure memory; from level 10, one order rule is added each level • Rule Challenge — order rules from round one • Flash — recreates the Ayumu chimpanzee experiment. Numbers flash for 0.65 → 0.43 → 0.21 seconds and hide automatically, no revives 3 Order Rules — what you memorize and what you tap end up different • Reverse — tap from the largest number down • Odd → Even — all odds ascending, then all evens • From Both Ends — 1, then the largest, then 2, then the second largest... Features • Learn in 3 seconds, challenge forever • Separate records for every mode — share your score card • 100% offline, no login, no signup • Fast, lightweight, dark design • English, Korean, Japanese
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