As soon as you start sharing your fitness data your privacy is shot.
While I am not that much of a private person, I prefer people not to know where I am — when I am out and about.
I don’t carry a ‘cell’ with me when I run. So, there is absolutely no way that my GPS data can get to the ‘cloud’ in real time.
But, I am going to checkout this ‘heatmap’. There can’t be too many fitness trackers out in the boonies where I live.