If you can get the track to yourself, laptracker app works great. Iphone only though, not android as far as I know. I built a cradle to hold my phone, plug a speaker into it, and set it in a 180 corner. You can hear each lap as you pass by your phone. Then you can email the run to yourself as well to check out later. Moving shadows can make it count extra laps, but I just move where it's placed at that time. The time is still the same, you just have to figure out your short laps/long laps if it starts counting shadows. That's if you analyze the laps later anyhow.

https://itunes.apple.com/us/app/lapt...691114189?mt=8

You can also download a stopwatch program to your laptop, and get a USB foot-operated push button and count your laps that way. That would work even if there were other cars on the track.

Your laps with the lap tracker app will be exact each time you pass the phone. I find when timing someone with a stop watch I am not perfect each time, but close enough to serve the purpose. Sometimes I just use the stopwatch on my phone and call out laps for my buddies. That works well too if you have a buddy you can trade being time keep with.

Practicing with laptimes can bring the hobby to a whole 'nother level if you want it to. Then you can actually start utilizing the slogan "slow is fast." As well as try different motors and see which works best for your skills. I've raced a 6.5 for years in stadium truck. I never believed I could be as fast with a smaller motor. My jaw hit the floor when I turned my fastest lap of the summer, as well as the best 5 minute run, with a 17.5 this year! Depends on the layout and the traction, but man it can really help those that get "stupid finger" during a race! lol