About
A timed mental-arithmetic game. You start at 50. Every half-second, two numbers appear — one adds, one subtracts. Pick one before the buzzer. Survive 50 seconds. Land as close to 50 as possible. Don't touch 0 or 100.
Mental arithmetic under time pressure. Decision-making when the clock is shorter than the thought. Staying composed when every option is flawed.
Not a math class. Not a brain-age app. Not a drill. Just a short, sharp game — four modes, one rhythm, no nonsense.
A portion of proceeds helps keep Real Trauma Intelligence — our free trauma companion app — available to anyone who needs it, at no cost. You buying this game helps someone else find a quiet tool in a hard moment.