What do you get when you cross an increasingly-popular smartphone complete with location-tracking functionality and a celebrity gossip magazine? Answer: an ethical quandary. Or not, as the case may be.

OK! magazine's CelebSpotter dropped into the iPhone App Store this morning, allowing users to search celeb hangouts, report a sighting, and see who you're likely to bump into down the local park – like a birdwatching app for showbiz twitchers.

Despite the obvious questions about encouraging celebrity stalking – raised here before by Jack Schofield – OK! magazine's group internet controller, Farzad Jamal, told the Guardian: "We would never do anything to compromise their privacy."

Costing £1.79, CelebSpotter "enables people across Britain to live the celebrity lifestyle for themselves", says Jamal. "The app uses your current location in the UK to tell you which celebs have previously been spotted in bars, pubs, clubs and restaurants near where you are. It makes life more fun – rather than just saying, 'let's eat in here, it looks alright' the OK! Celebspotter app enables you to say 'look, David and Victoria Beckham once ate in this place round the corner and loved it – let's try that!'.

More ... http://www.guardian.co.uk/media/pda/2010/jun/28/ok-magazine-iphone-app