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Harry's LapTimer Petrolhead

By Harald Schlangmann

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Harry's LapTimer is the advanced tool for car enthusiast. It records all types of sensor data provided by your iPhone/iPod/iPad (or external sensors), combines them, and makes them available to optimize your drive. Over time, you will get insights on your car and in your driving, not known before.

LapTimer offers more than 450 predefined tracks world wide. With its assistants, it is extremely easy to setup - just click your track and drive. It fully automates your lap timing using GPS, and presents the results to all kinds of media.

You are not limited to track driving only. For example, you may define your home and working locations as a 'track', collect statistics on different ways chosen, and analyze / optimize the time used every day.

Want to show your drive to your friends? LapTimer generates beautiful in car video recordings with all kinds of data overlaid, ready to be presented - e.g. on youtube. Even without video, recorded data can be analyzed using purpose designed views, making it easy to analyze and improve your driving performance.

Using online racing, you can use LapTimer in competition. LapTimer offers a Hall of Fame, allows watching you and your friends on track - all in real time. Compare your sector times, braking / acceleration points, and learn from each other.

You can start with your plain iPhone in the beginning and add external GPS and OBD II sensors later, step by step, and as you need it. LapTimer itself comes in three different editions: LapTimer Rookie is the entry level with all you need for lap timing; LapTimer Petrolhead is the advanced version including lots of video features, and LapTimer Grand Prix is the edition for professionals including Multi Cam recording, and advanced sensor and analytics functionality.

Please note that functionality depends on your device, the LapTimer edition chosen, and sometimes even external sensors added (like OBD II). Please visit our web page to get the full story. All edition can be upgraded later, all editions come with native iPhone and iPad support.

There are quite expensive stand alone solutions for track days available. Be smart and own the leading edge tool simply by using your iPhone and LapTimer. Besides the professional area, there is no known solution that offers more functionality than LapTimer does - across the market. As our ambition is to offer the best tool, LapTimer is enhanced continuously.

Please visit for detailed information on versions, FAQs / documentation, in depth technology background information, online racing, and supported device configurations. Join our user community on to be involved in future development - all with first class support.

What's New in Version 18.0.0

Hot new feature: participate in Challenges
‣ Challenges can be submitted to the server and downloaded by other users.
‣ Drive against other's times.
‣ More important, it is a great tool to compare your drive in details against others - e.g. your racing instructor.
‣ Challenges can be submitted public or to listed users only.

Lots of changes to video and overlay functions [Petrolhead and GP]
‣ New, vehicle-specific gadgets! Lean angles for motor bikes, extended OBD for cars, and calories burned / height profile for bicycles
‣ Video exposure lock
‣ Multi lap overlays and video manipulation
‣ Convenient video management for full sessions

Completely reworked Online functionality [Petrolhead and GP]
‣ Browse through all tracks active world wide!
‣ It is no longer required to have a track in your database to see track shapes and active driver positions
‣ LapTimer online view available directly on our LapTimer home page (includes desktop browsers)

New analytics [Petrolhead and GP]
‣ New G-G chart for analysis of general driving maturity
‣ Reference lap comparison for Map Chart
‣ Massive performance improvements for diagrams and imports

Improved sensor support
‣ Sensor specific configurations (VBOX Sport, Dual XGPS, OBD2 4U, generic NMEA and OBD sensors)
‣ MAP calculation for OBD
‣ Much improved power / fuel consumption calculations
‣ Support for Diesel engines.

Like all our major releases, this version includes a huge set of minor improvements and bug fixes on top!
And like all LapTimer updates, it is completely free for existing users. Enjoy!


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Harry's LapTimer Petrolhead
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This app is designed for both iPhone and iPad
  • USD 19.99
  • Category: Sports
  • Updated: 28 March 2014
  • Version: 18.0.0
  • Size: 34.6 MB
  • Languages: English, French, German, Japanese, Russian, Simplified Chinese, Spanish, Traditional Chinese
  • Seller: Harald Schlangmann

Compatibility: Requires iOS 5.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.

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