TenSync

TenSync is a minimal timing game: tap Start, then tap Stop at exactly 10.00 seconds.

The twist: when other iPhones running TenSync are on the same Wi-Fi, they auto-discover each other and start every round at the exact same moment (synchronized within ±2 ms). Each device stops independently and sees its own result, so you can race friends in the same room with no setup, no accounts, no servers.

A 1-second tick metronome (toggleable) helps you stay in rhythm. An 11-second time limit prevents endless waits. Your best attempt is tracked locally.

No accounts. No ads. No tracking.