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?
Features
• Learn in 3 seconds, challenge forever
• Your level IS your instant memory — share your score card
• 100% offline, no login, no signup
• Fast, lightweight, dark design
• English, Korean, Japanese