Carpe Five

Carpe Five is a one-button precision game. A timer starts counting and you tap STOP when you think exactly five seconds have passed. Level 1 accepts anything within half a second; each of the ten levels narrows the window until Level 10 asks for 5.000 on the dot. It is deliberately the opposite of a reaction-time test: there's nothing to react to, only your own sense of time. Level 1 plays instantly with no signup; a free account saves progress and unlocks 1v1 duels against friends and a daily challenge. Built in Hong Kong by IWTBNB Group.