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The circuit lap timer designed for iPhone
Your timer. Where you need it.
ST1 Track turns your iPhone into a circuit lap timer. Laps are detected automatically, and the timer stays available on iPhone, the Lock Screen, Dynamic Island, Apple Watch and CarPlay.
No timing box. No network required. You drive. ST1 Track times.
Available on iPhone. Android is coming soon.
A lap timer designed around your iPhone
The phone does more than record GPS. The whole session stays inside the Apple ecosystem: the iPhone screen, the Lock Screen, Dynamic Island, Apple Watch and CarPlay.
You start the session once. ST1 Track then detects laps automatically. You do not choose between the app in your pocket and the car display. It is the same session, visible where you look.
ST1 Track is an iPhone app, in French, English and German. The point is not another screen. It is keeping the timer available while you drive.
Your timer on CarPlay
Leave your iPhone where it is. Your lap timer and the essential information stay visible on the car's CarPlay screen.
ST1 Track uses Live Activities. On iOS 26, they appear in CarPlay. You follow the session without making the phone screen your main tool.
CarPlay
Session
1:32.481
142
km/h
Your timer on the wrist with Apple Watch
A glance at your wrist is enough to follow the session without handling your iPhone.
The ST1 Track timer is visible on Apple Watch. You keep the session in sight without pulling out the phone at every crossing.
Lap
1:32.481
Delta −0.214
Dynamic Island and the Lock Screen
Lock your iPhone and the timer keeps going. ST1 Track uses Live Activities so the session stays available from the Lock Screen and Dynamic Island.
You put the phone away. The session does not stop with it.
Lap
1:32.481
Delta −0.214
Not only a timer
The Apple ecosystem makes the timer readable. It does not sum up ST1 Track.
After the lap, the session is there to show where the time went.
Automatic laps
The session detects crossings. You do not restart the timer by hand at every line.
Sectors
The lap is split so you can see where you gain time and where you lose it.
Braking
Braking zones put the lap time back into the context of the track.
Speed
Speed helps you read the rhythm of the lap, not only the final number.
Theoretical lap
The theoretical lap gathers your best sectors and shows the potential of the session.
Comparison
You can set one pass next to another and see what changed.
History
Sessions stay available after the day, not only the best lap.
Leaderboards
On a circuit, your time can sit among the times recorded on that track.
Car, motorcycle or kart
ST1 Track is built for cars, motorcycles and karts. The vehicle changes. The lap timer stays the same: automatic laps, a saved session, and a timer you can read inside the Apple ecosystem.
A track day, a motorcycle session or a kart outing starts the same way. You pick the circuit. You start the session. You drive.
Car
Track days and club outings.
Motorcycle
A glance, without letting go of the bars.
Kart
The same timer, on a shorter lap.
No connection? You keep driving.
At a circuit, the network is often poor. ST1 Track keeps timing without a connection.
You do not wait for a signal to start the session, or for laps to be detected.
FAQ
Is ST1 Track an iPhone lap timer?
Yes. ST1 Track is a circuit lap timer for iPhone. It detects laps automatically and keeps the timer available on iPhone, the Lock Screen, Dynamic Island, Apple Watch and CarPlay.
Do I need a timing box?
No. ST1 Track times with the iPhone, without an extra box. Dedicated hardware still makes sense if you want more advanced telemetry.
Does the timer show on CarPlay?
Yes. On iOS 26, ST1 Track Live Activities show the timer and the essential session information on the CarPlay screen.
Does ST1 Track work with Apple Watch?
Yes. The session timer is visible on Apple Watch.
Does timing continue when the iPhone is locked?
Yes. Timing continues while the iPhone is locked, and the timer stays visible through Live Activities on the Lock Screen and in Dynamic Island.
Does ST1 Track need a network at the circuit?
No. ST1 Track also times without a connection.
Your iPhone is already in your pocket.
Your lap timer is too.