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

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
12 Ratings

12 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.

A2Tom ,

Slot car timer that works great

All I can say is this little app saved me lots of money. Works great tracks up to 4 lanes. It's very cool.

$elltheProphet ,

Great app for rc car lap tracking

I use this for timing my rc car laps on a track i set up in my driveway and it works great!! Only reason i didnt give 5 stars is i wish that when you email the results it would give you the average and best lap times like it does on the screen when app is open. Please update and make that happen!!


Sten Kaiser
2.3 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© Kaiser & Kaiser


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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