Harry's LapTimer Petrolhead by Harald Schlangmann (Universal)
Released: Nov 24, 2009
Version: 22.0.4
Size: 79 MB
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Ranking - Sports (iPhone)

Ranking - Sports (iPad)

Harry's LapTimer Petrolhead

Harald Schlangmann
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 1000 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 http://www.gps-laptimer.de for detailed information on versions, FAQs / documentation, in depth technology background information, online racing, and supported device configurations. Join our user community on http://www.gps-laptimer-forum.de to be involved in future development - all with first class support.

What's new in version 22.0.4
Version 22.0.4 is a bug fix release addressing issues reported.

Welcome to version 22 of Harry's LapTimer. This major release has a special focus on faster and broader sensor support. As a special feature, you can define the data storage rate independent from sensor update rates. As an example, even the internal GPS can give you smooth 10 Hz recordings now. A detailed list of changes is available below. Please report any issues directly to Harry@gps-laptimer.de or post on forum.gps-laptimer.de.

Sensor Handling
- Variable recording rates using splined interpolation (e.g. 5 or 10 Hz)
- Full brake pressure support
- Refactored existing code to allow flexible configuration
- Automatic bus type detection, all optimizations are done automatically
- Support for custom PIDs, formula based evaluation (experimental)
- Added support for physical ECU addressing, major speed improvement
- Improved OBD debugging support
- Further update rate improvements
- End to end sensor data queuing minimizing real time effects
- Support for extended channels: gear, odometer, brake pressure, individual
wheel speed, steering wheel angle and rate - requires scripting or
custom PIDs
- Support for ReDrive sensor
- Support for Cycling Speed and Cadence (CSC) sensors
- Disabled generic sensor configuration
- Support for VC601 TPMS sensors (experimental)

User Interface
- Lots of User Interface refinements
- Hall of Fame filtering by Group
- Further iPhoneX layout improvements
- Edmunds support removed (discontinued by Edmunds)
- Support for low rpm vehicles
- Precision wheel circumference settings
- Added Smart Bike section to Vehicle Details

- Added brake pressure to video overlays

- Update to watchOS 3.0 (no functional changes)
- Added entries for HERO6 BE and HERO 2018 [GrandPrix]

Special fixes
- Fixed "decoder busy" issue
- Avg. speed calculation uses standard configuration track length
- Full session video overlays improved

Optimizations, fixes, and minor improvements all over the place.
Screenshot #1 (iPhone)
Our verdict: Good
  • + Harry's LapTimer Petrolhead is a highly rated app (4.5-star).
  • + Harry's LapTimer Petrolhead is currently ranked #98 in paid Sports apps for iPhone.
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