Researchers have discovered a file on Apple’s iPhone and iPad that apparently keeps track of everywhere you go.

[ad#Google Adsense 300×250 in story]The file reportedly keeps the latitude, longitude and a timestamp of the iPhone’s location, according to the Guardian. Privacy advocates were quick to point out the dangers of such a file.

“This is a worrying discovery,” said Simon Davies, director of the pressure group Privacy International. “Location is one of the most sensitive elements in anyone’s life – just think where people go in the evening. The existence of that data creates a real threat to privacy. The absence of notice to users or any control option can only stem from an ignorance about privacy at the design stage.”

As one of the researchers pointed out, the file could be a great find for a jealous spouse or private detective who might want to pinpoint your location on a given day.

The researchers have setup a Web page and made an app that will let you see the file for yourself.