Clocker turns a phone on a fence post into official-grade timing equipment: 240 frames a second, a start you trigger with a wave of your hand, and a finish read the way photo-finish cameras read it — torso on the line.
See the evidence Coming soon to the App StorePoint the phone down your finish line. Clocker finds it and locks on — it tracks the line in the world, not on the screen, so handheld is fine.
Your hand over the camera is the starting gun. Sweep it away — the runner hears GO, and the clock starts on that exact frame.
The crossing is measured at 240 fps and spoken out loud. The runner hears their time before anyone looks at a screen.
A stopwatch gives you a number and asks for faith. Clocker shows you the frame before, the frame on the line, and the frame after — spaced so your eye can see the motion. Disagree? Scrub to the exact frame and set it yourself. Your call is the record.
gate 2% → 31% · 239.9 fps · torso on line
Tag the runner and the distance before the rep. Clocker keeps the history, draws the trend, and stamps PB on a new best — results-sheet style. No confetti. The celebration is the kid sprinting back to ask what they got.
240 fps capture with locked exposure. Frame-drop detection that tells you when a time is uncertain — and stays quiet when it isn't. A finish measured at the occupancy peak, the way photo-finish judges call it. Every mark stores the evidence that produced it. That seriousness is the gift: a backyard dash, treated like a world record attempt.