• Harry's LapTimer GrandPrix 1
  • Harry's LapTimer GrandPrix 2
  • Harry's LapTimer GrandPrix 3
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Harry's LapTimer GrandPrix

Harry's LapTimer is the advanced tool for car enthusiast. It records all types of sensor data provided by your smartphone (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 750 predefined racing 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. 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? Recorded data can be analyzed using purpose designed views, making it easy to analyze and improve your driving performance. This includes several export formats including Google Earth.

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 smartphone in the beginning and add external GPS and OBD II sensors later, step by step, and as you need it.

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.

There are quite expensive stand alone solutions for track days available. Be smart and own the leading edge tool simply by using your Android smartphone. 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.

Please check http://www.gps-laptimer.de/Compatibility_Android.html for compatibility information and guidance on external sensors.

This is the GrandPrix Edition of Harry's LapTimer. Compared to Petrolhead it adds support for remote controlling action cams (HERO3/3+/4 and Sony Cams), Picture in Picture video overlays, an enhanced Engine View, advanced analytics and support for professional data recording sensors.

Important: As a power app, LapTimer is quite demanding in terms of main memory and processing power. The Geekbench benchmark shows a good comparison of current devices and their processing performance. My tests using LapTimer v18 show you need a device scoring 1200 in the MultiCore benchmark to have fun. This means a device like Samsung's S III is kind of the lower end. Especially when recording and overlaying video, go as far up as possible.

In case you have purchased LapTimer Rookie or Petrolhead already, please check the Add-ons view in your existing app for an InApp upgrade to GrandPrix.

Category : Sports

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Reviews (17)

Jas. R. Jan 17, 2020     

Excellent. Not perfect, but by far the best bang for the buck. Data analytics are easy to read and compare, regularly recommend to advanced students.

Jeh. Z. Oct 11, 2020     

Spent the money for the best version.. the app is extremely buggy and support was weak.

Sal. A. Jan 2, 2021     

Extremely confusing and outdated app. Not user friendly.

And. H. May 25, 2019     

best app for lap times by far Always within .001 of my lap times from my transponder.

Pet. S. Jul 27, 2019     

Great app. does the job and more

Cal. C. May 28, 2019     

still the best app on the market

Ven. X. Oct 29, 2020     

It didn't work with my hero 4 session

Ger. M. May 22, 2019     

best bang for the buck !

SWB. Sep 10, 2020     

An update broke the lap time overlay at the end of each lap. So no lap times in video like in previous years.

Joh. G. Jul 7, 2018     

On my phone's built-in GPS the app almost never detects me crossing the start/finish line but works perfectly on other apps like TrackAddict which is completely free. Not only that but the external camera compatibility is completely broken. Save some money and look for some other options out there that happen to be much better, reliable and also completely free.

Lan. T. Jul 16, 2017     

App has gotten worse every revision and crashes on anything beyond basics. Preferred last year's software. Save your money, this app isn't what it used to be.

Ale. Mar 20, 2017     

Works very well, fluent layout and is packed with features UPDATE: Still very happy with the app since the initial purchase

ken. I. I. Mar 10, 2017     

Keeps crashing on my Nexus 6p.. I don't have time for that.

Jam. W. Aug 30, 2016     

I nearly switched to an iPhone just to get this app. Happy to see it on the Android. I need to find a way to use it more often.

A. G. u. Jul 11, 2016     

Pair this with a 10hz GPS and go pro hero 3 or 4 and you have a simple to use all in one logger with video overlay without the need for a PC or the cost of "pro" setups

Dim. T. Apr 21, 2016     

The latest update erased all my cars and setup!!! Confusing UI, online help unrelated to Android UI, got the recommended OBDLink LX but keep getting refresh rate too low. On a rally cross, didn't recognize me crossing the start line. Very disappointed at the price and the reputation.

Dan. T. Jun 25, 2015     

I am able to study my laps and look for opportunities of getting better