I installed this app just recently for the IPhone called Track Day, one of the first apps to utilise the GPS as a lap timer.
It also has a performance meter for 0-100kph testing, 0-400m, 0-1000m, etc, as well as having a cornering G meter and acceleration/braking G meter. Based on the tests it can also give a rough estimate of your car's power.
I tested the lap timer last night by doing laps (at the speed limit) around my area, and it works perfectly. Will test it against the MyChron TG and see how accurate it is.
http://tomatounion.com/
It also has a performance meter for 0-100kph testing, 0-400m, 0-1000m, etc, as well as having a cornering G meter and acceleration/braking G meter. Based on the tests it can also give a rough estimate of your car's power.
I tested the lap timer last night by doing laps (at the speed limit) around my area, and it works perfectly. Will test it against the MyChron TG and see how accurate it is.
http://tomatounion.com/
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