Track

Track: Lap Timer

Lap timing, data logging and analysis for motorsport — track days, karting and autocross — on iPhone, Apple Watch and CarPlay.

Draw a finish line once. From then on, Track times every lap on its own — no buttons, no setup at the pit wall — and shows you exactly where you gained or lost time.

Free. No ads, no account, no features locked behind a paywall.

**Safety first.** Track is intended for responsible use in a motorsport environment — circuits, track days, karting and autocross — under the rules of the venue. Never use it on public roads, set up your phone before you drive and don't handle it while driving. Use at your own risk. [Read the full advisories](#drive-responsibly).

`Highlights`

**Automatic timing.** The clock starts and stops when you cross a line you drew on a satellite map.
**Precise crossings.** Track calculates the instant your path crossed the line between GPS readings, instead of rounding to the nearest one.
**A delta you can trust.** Your pace is compared with your reference lap at the same point on the track, not at the same second.
**Sectors and splits.** Add intermediate lines to see where the time goes.
**Video with telemetry.** Record your lap with lap time, delta, speed, g-forces and a live minimap burned into the image.
**Analysis after the session.** Braking map, scrubbable charts and a ghost lap against your best.
**Apple Watch, CarPlay, Live Activities and widgets.** Glanceable everywhere, so you never have to pick up the phone.
**Private by design.** Everything is processed on your iPhone. No sign-up, no analytics.

`Features`

`Timing`

**Finish line, sectors and delta.** Track doesn't use a start button. The timer starts when you cross the finish line you drew and stops at the exact instant you cross it again.
**Interpolated crossings.** Instead of splitting the lap at the GPS reading closest to the line, Track uses the readings just before and after the crossing and calculates the precise moment your path went through it.
**Distance-based delta.** Comparing by distance keeps the number meaningful all the way down the straight, even after a slow corner exit.
**Sectors.** Draw intermediate lines to get split times. If you miss one because you ran wide, the lap still closes at the finish.
**Circuits and point-to-point.** A circuit closes one lap and starts the next at the same line. A point-to-point run — a hill climb, a timed stage — stops at the finish and waits for the next attempt.
**Invalidate a lap.** Went off, lifted for a yellow flag or hit traffic? Mark the lap invalid. It keeps its telemetry but stops counting toward records and the ghost.

`The HUD`

One big number — the lap time — with the delta right below it and the rest at the edges: lap number, sectors, last and best.
White on black while you drive. No speed, no colors and no g-forces on screen: those are in the analysis, once the car has stopped.
Dedicated portrait and landscape layouts.
The same short tap for every sector and every lap, whatever the time.

`Tracks`

Search for a circuit by name and see it in satellite view, where the painted line is clearly visible.
Already at the circuit? Stand on the line, point the phone in your direction of travel and Track places the finish line right there, oriented with the compass.
The layout draws itself: the first time you drive a track, Track saves the outline you followed and reuses it in the video minimap.
Share a track by link, QR code or by bringing two iPhones together. The layout travels; your times don't.
When you arrive, Track recognizes which of your tracks you're at and selects it for you.

`Garage`

A card for each car, with photo and color.
Setup notes that explain your times a month later: tire pressures, brake pads front and rear, weight, power and year.
Records are kept per car and per circuit. The card shows that car's record at the circuit you're at right now.

`Video with telemetry`

Lap time, color-coded delta, speed, g-forces and lap number, drawn frame by frame while you record. When you stop, the video is ready to post.
A corner minimap traces the circuit as you drive, with a dot showing where you are.
Optionally save the overlay on its own with a transparent background (HEVC with alpha) to drop over GoPro or helmet-cam footage in Final Cut Pro or Premiere.
Videos go straight to your photo library. Nothing is uploaded anywhere.

`Analysis`

Every lap keeps its full trace: position, speed, accelerations and, with Apple Watch, heart rate.
Charts you can scrub with your finger, with the values at each point.
A braking and acceleration map, or a speed map, painted on the layout in neutral colors. Tap any point to see its data. Speed is calculated from GPS and is for information only.
Ghost lap: two laps running at the same time on the map, yours against the reference.
Best times are always kept per circuit, plus lifetime totals: sessions, laps, distance and time on track.

`Free roam`

Record a run without a finish line — an autocross, a closed-road hill climb or a private track. See the full route painted by braking and acceleration, with distance, moving time, average speed and elevation gain. Free roam is for closed courses and authorized events only: Track shows a reminder before every run.

`Track conditions`

Air temperature, track temperature and the track condition — dry, damp or wet — saved with every session, so your times still make sense months later.

`Apple Watch and Health`

Lap time and delta on your wrist, white on black.
Every completed lap arrives as a tap on your wrist.
Heart rate and calories on a second page.
Sessions are saved to the **Health app** as workouts, with heart rate and calories burned.

`Live Activities, CarPlay and widgets`

**Dynamic Island and Lock Screen:** the lap timer and lap number stay visible with the phone put away. The system animates the clock, so it doesn't drain extra battery.
**CarPlay:** open Track on the car's screen to see your tracks on a map, nearest first. Tap one, start the session, and the screen switches to the numbers that matter — lap, sector, delta, splits, last and best — updated at every line crossing. The running clock lives on the CarPlay Dashboard as a Live Activity.
**Widget:** the last circuit you drove and your best time there, on the Home Screen or in CarPlay.

`Siri and Shortcuts`

Start a session hands-free: *"Start a track session in Track."* Track detects the circuit you're at and arms the timer with your primary car.

`iCloud`

Tracks, cars and sessions sync through your private iCloud. Change iPhones and everything is still there. If iCloud is unavailable, Track keeps saving on the device.

`Languages and units`

English, Spanish and Japanese. Metric or imperial units follow your iPhone's region, or you can choose in Settings.

`Requirements`

| | | |—|—| | iPhone | iOS 17 or later | | Live Activities and widgets | iOS 18 or later | | Live Activity on the CarPlay Dashboard | iOS 26 or later | | Apple Watch app | watchOS 10 or later | | CarPlay | A CarPlay-compatible vehicle |

Track is an iPhone app. It doesn't run on iPad or Mac.

`Privacy`

A driving log says where you were, when and how fast. Track treats it that way:

No account and no sign-up.
No analytics, no advertising, no tracking.
Coordinates, telemetry, heart rate and videos are processed and stored on your iPhone, or in your private iCloud. There's no Track server in between.
Nothing leaves your device unless you choose to share a track.

Read the full [Privacy Policy](/Track/PRIVACY.html).

`Support`

`Frequently asked questions`

The timer doesn’t start when I cross the line. Check that the finish line spans the full width of the track — a car on the outside of a short line never crosses it. Wait until the GPS status shows it's ready, and give it a few seconds under open sky before your first lap.

Does Track keep timing with the screen off or the phone locked? Yes. Once a session is running, timing continues in the background and the lap clock stays visible in the Dynamic Island and on the Lock Screen.

Which location permission should I allow? *While Using the App* is enough. Track uses your location to time laps and recognize the circuit you're at, and keeps timing in the background only while a session is running.

Can I try Track without going to a circuit? Yes. Open the **Settings** app, go to **Track → Testing** and turn on **Demo mode**. Track will simulate a car lapping a test circuit so you can see the timer, the HUD, CarPlay and the analysis working.

How do I use Track in CarPlay? Connect your iPhone to the car and open Track on the car's screen. Pick a track from the map and tap **Start Session**. The running lap clock appears on the CarPlay Dashboard.

Why does my video have no sound? While CarPlay is connected, video is recorded without audio. Apple doesn't allow apps to use the microphone while CarPlay is active.

How do I see heart rate? Install Track on your Apple Watch from the Watch app on your iPhone and allow access to Health when Track asks. Heart rate appears on the watch and is saved with each lap.

How do I restore my support purchase? In the Garage, open the menu at the top right, choose **Support Track**, and tap **Restore Purchases**.

How do I delete my data? Delete tracks, cars or sessions inside the app. To remove everything, delete the app, then remove its iCloud data from **Settings → [your name] → iCloud → Manage Storage → Track**. Details are in the [Privacy Policy](/Track/PRIVACY.html).

`Contact`

Found a bug or have a question? Email **track@prototypenow.com.mx**

Please include your iPhone model, iOS version and, if it's about timing, a short description of the track and what happened.

`Supporting Track`

Track is free and every feature works for everyone. If you enjoy it and want to help keep it going, there's an optional one-time purchase in the Garage menu. As a thank-you it unlocks five alternate app icons, an accent color of your choice and your signature in a corner of your videos.

`Drive responsibly`

Track is a lap timing and data logging tool for motorsport. Please read these advisories before using it:

**Motorsport environments only.** Track is intended for responsible use on circuits, at track days, karting and autocross events, under the rules of the venue and the instructions of the organizers and marshals. Never use it on public roads.
**Set up before you drive.** Mount your phone securely and choose your track, car and session with the car stopped. Don't handle your phone while driving.
**Nothing on screen asks you to go faster.** While you drive, Track shows only times, in white on black: no speed, no colors and no g-forces. Speed, colors and g-forces appear only in the analysis, after the session.
**Speed is for information only.** Speed shown by Track is calculated from GPS and may not be accurate. Your car's speedometer shows your actual speed.
**You are responsible for how you drive.** Follow the rules of the venue and traffic laws at all times. Use Track at your own risk.

The first time you open Track, it asks you to read and acknowledge a safety notice. If the iPhone is moving and no session is running, Track covers the screen until you stop or confirm you're a passenger. Before every free roam run, Track reminds you that it's for closed courses only.

`Credits`

Maps by Apple Maps.

Apple, iPhone, Apple Watch, CarPlay, Siri, iCloud and Dynamic Island are trademarks of Apple Inc. Track is not affiliated with or endorsed by Apple.