TRACE Timer: Performance, on Film

Field notes

TRACE combines once-per-second phone GPS with accelerometer, barometer, camera, and audio inputs to measure runs and produce telemetry-marked clips. Its timing modes include standing starts with switchable one-foot rollout, rolling windows, user-placed lap gates, and saved road segments for ghost comparisons. The page reports validation against a 25 Hz RaceBox Micro, including 0.1% distance error over 25 miles, while clearly limiting current reference testing to one bike, rider, and phone.