iOS · TestFlight beta
Two phones. One tree.
Staged turns two iPhones into a drag-racing start tree. Both screens go green at the exact same instant — the fastest clean reaction wins. Jump the light and you red-light.
How a race runs
Pair up
Two phones find each other over the local network — no internet, no servers, no sign-up.
Stage
Both drivers confirm ready. The phones sync clocks down to the millisecond.
Tree drops
Amber… amber… green — the identical cadence fires on both screens at the same instant.
Launch
Go on green, by tap or by motion. Best clean light takes the win. Too eager? Red light.
Three ways to race
Head-to-head
Classic standing start. Countdown, tree, launch — your reaction time against theirs, side by side.
Roll-on
Both passengers hold the target speed; the tree arms only when you're matched. Built for closed courses.
Practice
Solo against the tree. Grind your lights, chase your personal best, track every run.
A genuinely fair start
Staged syncs both phones with NTP-style clock alignment over a direct device-to-device link, then schedules one shared green. No lag compensation tricks, no server round-trips — the tree is physics-grade simultaneous.
- Works with zero internet — peer-to-peer over the local network
- No account required — optional sign-in backs up your garage and run history
- Millisecond reaction readouts, jump-start and no-go detection
Stage up.
Grab the beta, grab a friend, and find out who actually has the better light.
Join the beta on TestFlight