Best program for keeping track of Time (motor racing) - time

Question

Short Version:
Program to:
control racing (cars) laptimes (it must not reset)
be able to use as a chronometer
b able to use as a reverse chronometer (start in X min:secs end in 00:00)
Long Version:
I need a program to control time, I need the time to go forth and back (for me to choose)
and I insert the starting time.
I also need a program to control lap times.
If anyone know any program for these stuff (racing stuff), I would apreciate it, even if there only are paid solution, I still would like to take a look at them (I staring to make a program in python and it could be good for inspiration)
After some search, I could only find this:
It's a simple clock in python TKinter..... if anyone has anything more advanced... (easier to change :) )
from Tkinter import *
import time
from Tkinter import *
import time
class StopWatch(Frame):
""" Implements a stop watch frame widget. """
def __init__(self, parent=None, **kw):
Frame.__init__(self, parent, kw)
self._start = 0.0
self._elapsedtime = 0.0
self._running = 0
self.timestr = StringVar()
self.makeWidgets()
def makeWidgets(self):
""" Make the time label. """
l = Label(self, textvariable=self.timestr)
self._setTime(self._elapsedtime)
l.pack(fill=X, expand=NO, pady=2, padx=2)
def _update(self):
""" Update the label with elapsed time. """
self._elapsedtime = time.time() - self._start
self._setTime(self._elapsedtime)
self._timer = self.after(50, self._update)
def _setTime(self, elap):
""" Set the time string to Minutes:Seconds:Hundreths """
minutes = int(elap/60)
seconds = int(elap - minutes*60.0)
hseconds = int((elap - minutes*60.0 - seconds)*100)
self.timestr.set('%02d:%02d:%02d' % (minutes, seconds, hseconds))
def Start(self):
""" Start the stopwatch, ignore if running. """
if not self._running:
self._start = time.time() - self._elapsedtime
self._update()
self._running = 1
def Stop(self):
""" Stop the stopwatch, ignore if stopped. """
if self._running:
self.after_cancel(self._timer)
self._elapsedtime = time.time() - self._start
self._setTime(self._elapsedtime)
self._running = 0
def Reset(self):
""" Reset the stopwatch. """
self._start = time.time()
self._elapsedtime = 0.0
self._setTime(self._elapsedtime)
def main():
root = Tk()
sw = StopWatch(root)
sw.pack(side=TOP)
Button(root, text='Start', command=sw.Start).pack(side=LEFT)
Button(root, text='Stop', command=sw.Stop).pack(side=LEFT)
Button(root, text='Reset', command=sw.Reset).pack(side=LEFT)
Button(root, text='Quit', command=root.quit).pack(side=LEFT)
root.mainloop()
if __name__ == '__main__':
main()

Answer 1

If you want to go with a packaged solution, you should try some of the apps:
for your android phone: http://www.bestandroidappsreview.com/2010/05/top-android-app-ultimate-stopwatch.html
for your iphone: http://www.apple.com/webapps/utilities/stopwatch_benku.html which is free, but if you want a more powerful stopwatch you should try LAPZERO app (see demo http://www.lapzero.com/v4/)
for your windows mobile phone: http://www.ageye.de/index.php?s=grace/about
or find one for your desktop computer platform/system on google

Answer 2

So what you want is a milliseconds accurate stop watch and lap timer.
Not that I have tried it but heres one I found on google http://www.xnotestopwatch.com/
I wish I could vote, cause that import tardis crack was a good one. :P