Harry's LapTimer is the advanced tool for car enthusiast and track day visits.
4.19·147 reviews·5,000+ downloads
About Harry's LapTimer GrandPrix
Harry's LapTimer GrandPrix is a sports app developed by Harald Schlangmann.
Download Statistics
Harry's LapTimer GrandPrix has been downloaded 8.8 thousand times. In the last 30 days, the app was downloaded 30 times. It is ranked in the top 100 sports apps.
User Ratings
Harry's LapTimer GrandPrix is rated 4.19 out of 5 stars. The rating is based on 150 ratings.
App Information
Harry's LapTimer GrandPrix costs $22.99 to download. The APK download size is 42.82 MB. The latest version available is 25.0.2. The last update was on May 20, 2025.
Technical Requirements
Harry's LapTimer GrandPrix requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play May 2015.
Description
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 1000 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 Harry's LapTimer 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 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.
Recent changes: - fixed: crash when opening Lap Details and scrolling to bottom
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Comments on Harry's LapTimer GrandPrix for Android
★★★★★Charles Kowalczyk· Nov 7, 2015
Best Lap Timer available with support second to none If you are looking for a lap timer for your track days, you can end your search here. iOS's users have had the pleasure of this wonderful lap timer for a while and now the Android version is just as good. If you have any ideas to make the app better or need help using it, there is a forum for this app and Harry himself will generally reply within 12 hours. Can't ask for better ongoing support than that!
★★★★★Hans Caspary· May 1, 2017
If you are a track rat, this app is phenomenal! 🏎️🏎️🏎️
★★★★★Mike Davies· Sep 1, 2017
I love this app. It takes a little bit of time to get set up, but it's well worth it if you want to do any sort of analysis. Reading other reviews on here, it's clear that people are simply not taking this time, and have not tried other massively more expensive telemetry solutions. I can hook up an external 10Hz GPS, an OBD-II Bluetooth dongle, and a GoPro for dual video recording, and it just works! Find me something else that comes close for this price (accessories included) and I'll eat my hat. I show up at the track, mount my phone, turn on my GPS, plug in my OBD-II dongle, and fire up the GoPro, and then just load a track and go! End of session or day, I review. I learn. I go faster! It's amazing, and frequently reminds me that slow is fast as I think I've done a killer lap and then learn I'm actually 1-2s off my pace. Great job Harald, thanks for the very dedicated support, and keep up the good work.
★★★★★Nicholas Barbato· May 22, 2025
Great app for quality and easy to use racetrack data logging. Harry offers great support and app integrates well with OBD data, external gps units and video recording devices.
★★☆☆☆Jezza G· Oct 12, 2016
Impenetrable interface I am very used to hi tech gadgets and software and getting the best out of them. I spent a lot of time reading all the haphazardly presented documents and trying it out before my first track day. Suffice to say that on a whole track day I wasted much of the time trying to get the software to talk to the Gopro hero 3+ and record. I only managed to record 2 x 15-min sessions the whole day. A complete waste of money, I wish I could get a refund. I will be buying the new Garmin virb, 1 easy on/off button.
★☆☆☆☆Johnny Guindi· 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 Track Addict 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.
★☆☆☆☆A Google User· Jun 3, 2015
Waste of money Do not buy this app. Complete waste of money. Had a free app before and worked really well for free. Tried this all day at my last track day with full 3g service and did not work once... Maybe it needs to be hard-wired on to the car, but you are not allowed in the UK and why would a free app work over this when I paid £20... Absolutely rubbish and biggest waste of my money.
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