Great App

I just used this for the first time at Summit Point and it was great! The lap times were within 1/10th of a second and often within a few 1/100 of a second compared to the transponder! Worked great every time and did not use data and the battery did not even go down very fast. Amazing App!

Used with an iPhone 4, no Tom Tom kit.

Brent19 about Harry's LapTimer Rookie, v13.2