Grokr launches on iOS and tries to one-up Google Now

Also Google Now is available to any Android device running 4.1, I have it on my DNA and my GF has it on her SGS3 on T-Mobile. That Grokr name is a bit on the ugly side to even look at. After watching the video I am wondering, how in the hell does Grokr know anything about you to even give you information relevant to what your interests are? I mean LinkedIn, facebook don't actually have that information listed, I just want to know how it will magically figure all this out? It does look pretty good, but I was a little worried with that whole it will give you trending news and such which to me sounds like annoying pop ups in my web browser.
Hope it's actually a great app that succeeds on all platforms, nothing better that exposure.

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