Clutch: Lap Timer & Pace Notes

Rally co-driver & track data

Free · In‑App Purchases

Your personal Lap timer + Rally co-driver + G meter in one app. Real-time delta, sector splits and brake points on closed circuits — and 1–6 voice pace notes on any road. Clutch writes your pace notes for you. Record the road you drive, or import a route - Clutch works out every corner from the geometry, including which way it goes and how tight it is, then speaks them to you ahead of time while it times your laps from actual gate crossings. BUILT AROUND ONE LOOP - Tracks: draw the road you drive, or import a KML / GPX file - Drive: arm at the start gate, and let the voice call the corners - Review: see exactly what happened at every corner CORNERS ARE GENERATED FOR YOU You never type a pace note. Give Clutch a route - recorded by driving it once, or imported as KML / GPX - and it works out on its own: - where the corners are - which way each one goes - how tight each one is - how far it is from the next Then it reads them back to you in order, ahead of time, as you drive. FREE, PERMANENTLY - Free Roam timing on any road, anywhere - no track needed, never limited, never counted - Draw a track by hand, or import KML / GPX from Files, Mail, iCloud Drive or any share sheet - Corner analysis and full-route preview: every corner, its direction and severity, on the map and in a list - Play a single callout, or rehearse the whole route before you drive - G meter with 1.5 / 3 / 5 / 8 G ranges and reference rings, altitude and heading, and a live microphone sound-level meter TIMING THAT STARTS ON THE LINE Timing begins on a measured start-gate crossing - not on a button press - so your lap time reflects the lap, not your thumb. Laps, best lap, segment (point-to-point) timing, and a result screen that shows corner speeds straight away. REVIEW EVERY CORNER Speed and G at each corner, a speed chart, a G chart, a colour-coded trace on the map, and a replay you can scrub through. Compare a wet run against a dry one on the same track, and see what the conditions actually cost. PERFORMANCE TESTS Measure acceleration runs and braking distance - a straight, repeatable measuring stick for the car itself. PRO - ONE-TIME PURCHASE Clutch Pro is a single one-time purchase (a non-consumable in-app purchase). It is not a subscription and it does not renew. It unlocks: - unlimited timed runs on saved tracks, with voice pace notes - unlimited acceleration and braking tests - your full run history - data export and share cards - per-corner G recording while driving - wet / dry comparison Family Sharing is supported. PRIVATE BY DESIGN - No account, no login, no cloud - No ads, no analytics, no third-party SDK - Your routes, runs and measurements stay on your phone, and you can delete them at any time - Clutch never records audio - the microphone is used only to draw a level meter, and only while you are on the Tools page WORKS OFFLINE No server, no signal needed. Maps need a connection the first time you view an area; recording, timing and pace notes do not. DRIVE RESPONSIBLY Clutch does not suggest, display or announce any recommended, target or "safe" speed, and it does not encourage speeding. It describes the road - corner direction, severity and distance. Any speed figure you see comes from your own recorded run and is shown after the run, for analysis. Use Clutch only where it is legal and safe to do so: track days, closed roads and private property. Always obey traffic laws. Clutch is an iPhone app (iOS 17 or later). It does not support CarPlay.

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The developer, 双赢 周, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

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    Information

    Seller
    双赢 周
    Size
    7.5 MB
    Category
    Sports
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    Location
    This app may use your location even when it isn’t open, which can decrease device battery life.
    Languages
    English and Simplified Chinese
    Age Rating
    16+
    In-App Purchases
    Yes
    Copyright
    © 2026 Clutch
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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