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 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

Version 22.1.4

Changes in v22.1.4
- Improved sync point maintenance for multi lap overlays
- Expanded usable parameter range to A .. AZ for custom PIDs
- Fixed an issue with ECU addressing
- Improved Sensor Information display for OBD adapters
- Improved message showing import results

Ratings and Reviews

4.8 out of 5
5 Ratings
5 Ratings
ThinEndOfTheWedge ,

Bought this app, Best of British thanks to you, Sir!

As the previous reviewer, I rarely purchase apps. In fact, this may be the first or second app I've EVER BOUGHT. But I'm pleased I made the effort.

When you compare this to the cost of a single trackday, including fuel, tyres, helmet purchase cost…it's a no-brainer. The app is slick, well thought out and a joy to use.

The support networks are strong, the writer seems to have a good rapport with one of the major suppliers of aftermarket GPS dongles and in all, I can't really fault it.

All I'm gutted about is that I'm probably going to pay for an upgrade to V15 (15! most apps don't get out of v3-4!) and I won't get much use out of this version. But it is what it is.

>> edit >> I've just been contacted by the app's developer, who has assured me that existing users will receive a free upgrade to v15 if and when it comes out. I am sure it will be when, but it's not my place to presume!

That is top customer service. Doesn't get much better, I guess!

Thanks for the development work, Harry. Appreciated in this corner of a foreign field.

chrisbedford27 ,

Just Awesome

This app far exceeded my expectations. Truly take my hat off to you guys. The overlay feature is fantastic. Everything worked and worked well without any input from yourself you just load up the track you don't have to press start stop over the finish line etc just start it once and it will start timing as auto as you go over the start finish line. Video feature is amazing and the other features an data just blows your mind. On top of all that it works! Did I say that before? Lol great app no stunning app well worth the money. If your into track days you can not be without this app. Simple as that!

Justin FD2 ,


I can't explain how good this app this!! It's amazing how much this app improved my track day experience! I will now be using it on every day event I'll go on!

If you've got a track day coming up I can not express more you need this app! I know it's a little expensive but I promise you you'll love it ;)


Harald Schlangmann
92 MB
Requires iOS 9.3 or later. Compatible with iPhone, iPad and iPod touch.
English, French, German, Italian, Japanese, Simplified Chinese, Spanish, Traditional Chinese
Age Rating
Rated 4+
© Harald Schlangmann
In-App Purchases
  1. Grand Prix Upgrade £9.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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