ProSolo Tree vs TempoGuess

ProSolo Tree is a quick reaction timer. Try and get a .500 reaction time to score a perfect light.

How good is your inner clock? TempoGuess is a deceptively simple test of timing and nerve. You're given a target time. You press START — and the timer vanishes. No countdown, no ticking. When you feel the time has passed, you press STOP. The closer you are, the higher your rank: Bronze, Silver, Gold, Platinum… or the perfect Diamond. It sounds easy. It isn't. And you'll want "just one more try." ▸ 8 GAME MODES Classic, Easy, Hard, Blind (the target vanishes!), Rush (10-round combo runs), a daily one-shot Challenge, hourly Beat-The-World, and pass-and-play Multiplayer. ▸ CLIMB AND UNLOCK Earn XP, level up, and unlock themes, avatars, profile borders, sound packs, and victory effects. Decimal-precision targets unlock as you master your timing. ▸ YOUR PERSONAL COACH TempoGuess learns your habits and tells you whether you stop early or late — so you actually improve. ▸ CHALLENGE YOUR FRIENDS Share a result and friends get a link to beat your exact time. Closest wins. ▸ PLAYS ANYWHERE Fully offline. No account. No data collected. Just you and your sense of time. Think you can hit the time? Prove it.