You mean Trapster?
Forgive my ignorance, but did police agencies not say the exact same thing about CB Radios hmm maybe 35 years ago!
The news often does not get the whole story right, but here's my take on it.
First off, a lot of iPhone apps are useless, if not down right bogus to begin with, so be carefull there.
Secondly, in Ontario, *anything* that calls itself a "radar detector" is illegal, even if it works or not. Give you an example - say you fill a bag full of sugar or flour, then you go to downtown Toronto and try to sell that bag on the street, pretending it is cocaine. If you get caught, you get the same penalty & charge as if the stuff was for real. Long bit of case law on this point, too long to get into right now.
Now here's the thing - say this iPhone app called itself "list of known radar traps" - that's different, that, IMO, would be legal. An example of this is the book you buy called "Traveling the I-75" - or something to that effect. It lists all known radar traps, and it is legal to buy, own and use on both sides of the border.
But the "semantics' of the issue is the use of the term "radar detector." Heck, if you made a bunch of "witching sticks" - the things some people use to find water for digging wells - well, if you had a pile fo them, and at some flea market, you called them "radar detectors", you could get busted. Even if you were hauled in front of a judge and you siad your radar detector worked only on witchcraft , you'd likely be in for a legal fight.
Don't shoot me, I'm just the messenger, and I agree, the law can be an ass, but there you go
joe