According to this guy's blog here an iphone (an most smartphones for that matter) are illegal to use as a distance measuring device because they have a compass. Now this is news to me and even though the guys argument does have a little bit of merit I disagree with his interpretation of the rules. Also the fact that thousands of us are using their Iphone for distance measuring I am surprised it has taken so long for someone to work out they are illegal. Over here in New Zealand the golfing body (from what I have been told) has ruled gps devices legal on all courses and even in amateur tournaments I believe.
So what do the rules gurus on here reckon?