Home/Guides
ST1 Track guides
Three pieces. Three intents. Time laps, understand GPS, read your chronos.
How to time your laps on circuit with an iPhone
You do not need to wait for a timing box to know your lap time. A closed circuit, a session and an iPhone that can detect the line are enough to start.
iPhone GPS on circuit: how accurate is a lap time?
An iPhone is not a dedicated 25 Hz logger. It can still time a track-day session usefully, if we stay honest about what it measures.
Lap time, sectors and theoretical lap: understand your chronos
A lap time is only useful if it explains where time hides. Sectors and the theoretical lap turn a session into a reading, not just a ranking.