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> when their running watch shows a 10.0 km run only to find out that it was just 9.995 km and Strava shows it as 9.99 km.

That is a 10 meter difference between what Strava and the running watch report. That does not sound that atrocious?

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I think the point is that effort is not tracked as a 10k, so you don't see that in your PR history, etc. Plus it is just annoying to do something big for yourself and have a tool publicly shortchange you.

Definitely not. Everyone knows these things are super accurate, considering that it's pretty darn good.

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