10,000 - 50,000 downloads

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Trackmaster is a racing lap timer that works great for autocross, hillclimbs, rally, and track days! Use for motorcycles, cars, and karts!

**Featured in Road Racing World Magazine, Autoweek, &**

Trackmaster provides the following features:
•Record the following track data: position, speed, acceleration, altitude, bearing, absolute time, split times, elapsed times, and lap times.
•Use the predictive lap timer for instant feedback.
•Record your track data using multiple trigger modes.
•Record video with automatic upload to
•View your lap times and split times with graphical analysis on your phone.
•Calculates your best theoretical lap time and best rolling lap time.
•Replay your track data instantly on your phone.
•Race with your friends and get real-time race positions.
•Share your track data via email, web posting, Facebook or Twitter.
•Post real-time lap times to Facebook and Twitter for your fans.
•Sync your data to the cloud. Back up your data and sync to multiple devices. Manage your track data, analyze your data, and search for data at
•Provide real-time track position and data using Live View.
•Reports your race position using the Race Group feature.
•Runs in background so that you can run other apps concurrently or not have phone call interruptions (this will stop logging on other apps).
•Send your data to Google Earth for desktop replay, analysis, and editing.
•Send your data as a spreadsheet for analysis in MS Excel or Open Office.
•Enable speech to have your speed and times spoken to you while you're racing. This works great for motorcycle racers using a stereo bluetooth headset.
•Provide real-time lap times and speed to your fans via Twitter and Facebook.
•Launch Street View to see a panoramic view of your race line and the track.
•Supports metric and English units.
•Supports external bluetooth GPS receivers (via add-on) for faster update rates. Settable rates 1-10 Hz.
•Download custom layouts or create your own.
•Overlay your laps to compare your race line.
•Record your setup for car, motorcycle, and karts.
•Export video data for video overlays.

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Recently changed in this version

- Fixed Twitter API path.
- Fixed Facebook API.
- Added new tracks.
- Predictive lap timing is now available. Choose the Predictive logger layout. Have it based on last lap, best lap, or split marker lap time under Settings->Time Delta Mode.
- Can now speak your split marker notes. This can be useful for reminders. Enable this in Settings->Audio & Video.
- Help in the app and on the web site now list the required app permissions and explanations.
and much more!

Comments and ratings for Trackmaster
  • (69 stars)

    by Dave Thompson on 28/12/2013

    Just wanted to see lap times and couldn't figure it out.

  • (69 stars)

    by Danny Lu on 27/12/2013

    This app has potential, but it is completely unreliable and hard to use. Nothing worst than coming back from a session only to find out nothing is recorded. I wish I could get my money back. I would recommend RaceChrono instead. It is much better and it's

  • (69 stars)

    by Nick Foster on 18/10/2013

    Doesn't always work but when it does, it gives a lot of information.

  • (69 stars)

    by Chadwick Morehead on 16/10/2013

    Has stability issues, crashing often. Interface is a bit cumbersome, not ideal for quick access in the grid. Data export isn't standard. No OBD recording option. Too much displayed on recording screen, making the text small, plus bad color choices mea

  • (69 stars)

    by David Palumbo on 16/10/2013

    Why does this app need a trigger to start recording data? If your GPS or split markers are out it will never start and you get no data so you cant even reposition your splits over the actual tracks later. Racechrono allows you to specify the width and dir

  • (69 stars)

    by Jonathan Hair on 14/10/2013

    I used this for the first time over the weekend using the internal GPS on my LG Optimus G. The lap times match those of friends using a stop watch very closely. Still, I plan on getting a blue tooth GPS soon for improved accuracy. The only issue I had wa

  • (69 stars)

    by Mike Jackson on 05/10/2013

    Deleted sessions, did not record one. When you watch video the speed and other data does not change. This app used to work well.