LapTracker - Auto Timer 4+

Sten Kaiser

    • $1.99



The automatic lap timer that speaks over 30 languages!
LapTracker is a motion detection-based lap timer that can be used to track runners, cyclists, cars, models, swimmers, karts, slot cars etc. The camera view has up to four adjustable detection zones that can be used to track up to four different racers. The iPhone/iPad is placed on the side of the track and laps are automatically counted, timed and spoken. Results are presented in graphical form to enable simple and straightforward comparison of participants, and can also be submitted by email for further analysis.

"An excellent tool to help you practice to get the perfect lap"

What’s New

Version 4.0.1

This app has been updated by Apple to display the Apple Watch app icon.

Fixed the 'Send results' button on iPhone

New in 4.0
- Much more flexible detection zones.
- The results are automatically saved and results from multiple races can be emailed.
- Lap number in voice feedback.
- Sound feedback improvements.
- Unlimited detection reset.
- The camera light can be turned on.
- Bug fixes.

Ratings and Reviews

4.8 out of 5
64 Ratings

64 Ratings

Gruntwerks ,

Great for Slot Car Lap Times

Saved a bundle over diving headlong into an Arduino board, LCD, reed magnetic switches, tracking down someone who knows C++, and everything else it would have taken to set up a home made electronic lap timer for my slot car track. Instead, I dug some poster tack out of the junk drawer, and a juice glass out of the cabinet to hold my iPhone at the right angle, and paid $1.99 for an app. BOOM! Now I have an awesome lap timer. My brain is racing, thinking about all the things I can time, like my 5 year old running figure eights around our house chasing monsters on his Vtech watch, or how fast I run to the pantry and back when I’m making curry, because my misen place skills are crap and I never have everything I need at hand. If it moves, you can time it... this is sooooo good for my OCD, you have no idea.

Hsgdfr ,

Ingenious use of iPhone technology for the slot car enthusiast

I am using this app for my home use AFX four lane track set up. I simply mounted the iPhone over the track using a suction cup Bendy rod iPhone mount like you would use on a car windshield. The phone can be positioned perfectly with the bendy/rod to get perfect angle for lane identification from the app set up using the camera. Simple to use app extremely cost efficient as compared to the light optics/ laptop set up’s. 2 bucks vs 200 bucks! (Would be great a great enhancement to be able to customize the voice using the iPhone voice choices.)

jarvie1293 ,


I’ve always done manual lap counting, pressing a button with each pass, not very accurate. Now thanks to Laptracker, and a little camera bridge, I have a decent lap counter and timer. What’s not to like about the price. There are a few glitches with the voices/ sounds, though. But the timer works every time. I look forward to any updates in the future.

App Privacy

The developer, Sten Kaiser, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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