Watch Accuracy Tracker

I had an idea the other day that I would write a small app in Excel to keep track of all my watches.

I was planning to use a constant source like :

to keep track of the ‘real’ time and then have an ability to take a ‘snapshot’ of what the time is on each watch in a list ( that can be added to of course). This way using the inbuilt goodies of Excel all manner of graphs and stats can be applied to the raw data and people can see how their watch is behaving.

I was also thinking of adding a few features like resting orientation to see if any of the theories about leaving the watch 3 down, 9 down , dial up, dial down do influence the readings. Along with whether the chrono is running, is it being worn during the timing period etc.

Would anyone be interested in a copy of this? If anyone has any ideas / suggestions that would be great.

I am also thinking of using this as a quide too :